return typle for mathutils slice's.

The main advantage with this is that its close to twice as fast to do 'vertex.co[:]' then 'tuple(vertex.co)', this is common for writing a vertex array.
the correct python behavior in this case is to return a copy of the original type, however euler and quats don't support different sizes so we cant do so easily.

source/blender/python/generic/mathutils_color.c

@@ -213,7 +213,7 @@ static int Color_ass_item(ColorObject * self, int i, PyObject * value)
 //sequence slice (get)
 static PyObject *Color_slice(ColorObject * self, int begin, int end)
 {
-	PyObject *list = NULL;
+	PyObject *tuple;
 	int count;
 
 	if(!BaseMath_ReadCallback(self))
@@ -222,14 +222,14 @@ static PyObject *Color_slice(ColorObject * self, int begin, int end)
 	CLAMP(begin, 0, COLOR_SIZE);
 	if (end<0) end= (COLOR_SIZE + 1) + end;
 	CLAMP(end, 0, COLOR_SIZE);
-	begin = MIN2(begin,end);
+	begin= MIN2(begin, end);
 
-	list = PyList_New(end - begin);
+	tuple= PyTuple_New(end - begin);
 	for(count= begin; count < end; count++) {
-		PyList_SET_ITEM(list, count - begin, PyFloat_FromDouble(self->col[count]));
+		PyTuple_SET_ITEM(tuple, count - begin, PyFloat_FromDouble(self->col[count]));
 	}
 
-	return list;
+	return tuple;
 }
 //----------------------------object[z:y]------------------------
 //sequence slice (set)

source/blender/python/generic/mathutils_euler.c

@@ -443,7 +443,7 @@ static int Euler_ass_item(EulerObject * self, int i, PyObject *value)
 //sequence slice (get)
 static PyObject *Euler_slice(EulerObject * self, int begin, int end)
 {
-	PyObject *list = NULL;
+	PyObject *tuple;
 	int count;
 
 	if(!BaseMath_ReadCallback(self))
@@ -452,14 +452,14 @@ static PyObject *Euler_slice(EulerObject * self, int begin, int end)
 	CLAMP(begin, 0, EULER_SIZE);
 	if (end<0) end= (EULER_SIZE + 1) + end;
 	CLAMP(end, 0, EULER_SIZE);
-	begin = MIN2(begin,end);
+	begin= MIN2(begin, end);
 
-	list = PyList_New(end - begin);
+	tuple= PyTuple_New(end - begin);
 	for(count = begin; count < end; count++) {
-		PyList_SET_ITEM(list, count - begin, PyFloat_FromDouble(self->eul[count]));
+		PyTuple_SET_ITEM(tuple, count - begin, PyFloat_FromDouble(self->eul[count]));
 	}
 
-	return list;
+	return tuple;
 }
 //----------------------------object[z:y]------------------------
 //sequence slice (set)

source/blender/python/generic/mathutils_matrix.c

@@ -1398,7 +1398,7 @@ static int Matrix_ass_item(MatrixObject * self, int i, PyObject * ob)
 static PyObject *Matrix_slice(MatrixObject * self, int begin, int end)
 {
 
-	PyObject *list = NULL;
+	PyObject *tuple;
 	int count;
 	
 	if(!BaseMath_ReadCallback(self))
@@ -1406,16 +1406,16 @@ static PyObject *Matrix_slice(MatrixObject * self, int begin, int end)
 
 	CLAMP(begin, 0, self->rowSize);
 	CLAMP(end, 0, self->rowSize);
-	begin = MIN2(begin,end);
+	begin= MIN2(begin,end);
 
-	list = PyList_New(end - begin);
+	tuple= PyTuple_New(end - begin);
-	for(count = begin; count < end; count++) {
+	for(count= begin; count < end; count++) {
-		PyList_SET_ITEM(list, count - begin,
+		PyTuple_SET_ITEM(tuple, count - begin,
 				newVectorObject_cb((PyObject *)self, self->colSize, mathutils_matrix_vector_cb_index, count));
 
 	}
 
-	return list;
+	return tuple;
 }
 /*----------------------------object[z:y]------------------------
   sequence slice (set)*/

source/blender/python/generic/mathutils_quat.c

@@ -480,7 +480,7 @@ static int Quaternion_ass_item(QuaternionObject * self, int i, PyObject * ob)
 //sequence slice (get)
 static PyObject *Quaternion_slice(QuaternionObject * self, int begin, int end)
 {
-	PyObject *list = NULL;
+	PyObject *tuple;
 	int count;
 
 	if(!BaseMath_ReadCallback(self))
@@ -489,14 +489,14 @@ static PyObject *Quaternion_slice(QuaternionObject * self, int begin, int end)
 	CLAMP(begin, 0, QUAT_SIZE);
 	if (end<0) end= (QUAT_SIZE + 1) + end;
 	CLAMP(end, 0, QUAT_SIZE);
-	begin = MIN2(begin,end);
+	begin= MIN2(begin, end);
 
-	list = PyList_New(end - begin);
+	tuple= PyTuple_New(end - begin);
-	for(count = begin; count < end; count++) {
+	for(count= begin; count < end; count++) {
-		PyList_SET_ITEM(list, count - begin, PyFloat_FromDouble(self->quat[count]));
+		PyTuple_SET_ITEM(tuple, count - begin, PyFloat_FromDouble(self->quat[count]));
 	}
 
-	return list;
+	return tuple;
 }
 //----------------------------object[z:y]------------------------
 //sequence slice (set)

source/blender/python/generic/mathutils_vector.c

@@ -807,7 +807,7 @@ static int Vector_ass_item(VectorObject *self, int i, PyObject * ob)
   sequence slice (get) */
 static PyObject *Vector_slice(VectorObject *self, int begin, int end)
 {
-	PyObject *list = NULL;
+	PyObject *tuple;
 	int count;
 
 	if(!BaseMath_ReadCallback(self))
@@ -816,14 +816,14 @@ static PyObject *Vector_slice(VectorObject *self, int begin, int end)
 	CLAMP(begin, 0, self->size);
 	if (end<0) end= self->size+end+1;
 	CLAMP(end, 0, self->size);
-	begin = MIN2(begin,end);
+	begin= MIN2(begin, end);
 
-	list = PyList_New(end - begin);
+	tuple= PyTuple_New(end - begin);
 	for(count = begin; count < end; count++) {
-		PyList_SET_ITEM(list, count - begin, PyFloat_FromDouble(self->vec[count]));
+		PyTuple_SET_ITEM(tuple, count - begin, PyFloat_FromDouble(self->vec[count]));
 	}
 
-	return list;
+	return tuple;
 }
 /*----------------------------object[z:y]------------------------
   sequence slice (set) */