use ValueError when vector/matrix multiplications sizes are not supported, was using TypeError for mat*vec and ValueError for vec*mat.

source/blender/python/mathutils/mathutils_Vector.c

@@ -1497,7 +1497,7 @@ int column_vector_multiplication(float r_vec[MAX_DIMENSIONS], VectorObject *vec,
 			vec_cpy[3] = 1.0f;
 		}
 		else {
-			PyErr_SetString(PyExc_TypeError,
+			PyErr_SetString(PyExc_ValueError,
 			                "matrix * vector: "
 							"len(matrix.col) and len(vector) must be the same, "
 			                "except for 4x4 matrix * 3D vector.");

source/tests/bl_pyapi_mathutils.py

@@ -111,8 +111,8 @@ class MatrixTesting(unittest.TestCase):
 
         vec = Vector((1, 2))
 
-        self.assertRaises(TypeError, mat1.__mul__, vec)
-        self.assertRaises(ValueError, vec.__mul__, mat1)  # Why are these different?!
+        self.assertRaises(ValueError, mat1.__mul__, vec)
+        self.assertRaises(ValueError, vec.__mul__, mat1)
 
         mat2 = Matrix(((1, 2),
                        (-2, 3)))