bugfix, ActionActuator was missing many checks for PyArg_ParseTuple failing.

This meant an error in a script could be reported in a different line or script file which makes it quite hard to trace the problem. There were also places where invalid pointers could be used because of this.
The whole game engine pyapi probably needs to have these checks added.

source/gameengine/Converter/BL_ActionActuator.cpp

@@ -641,6 +641,9 @@ PyObject* BL_ActionActuator::PySetAction(PyObject* self,
 				m_blendframe = 0;
 		}
 	}
+	else {
+		return NULL;
+	}
 	
 	Py_INCREF(Py_None);
 	return Py_None;
@@ -660,6 +663,9 @@ PyObject* BL_ActionActuator::PySetStart(PyObject* self,
 	{
 		m_startframe = start;
 	}
+	else {
+		return NULL;
+	}
 	
 	Py_INCREF(Py_None);
 	return Py_None;
@@ -679,6 +685,9 @@ PyObject* BL_ActionActuator::PySetEnd(PyObject* self,
 	{
 		m_endframe = end;
 	}
+	else {
+		return NULL;
+	}
 	
 	Py_INCREF(Py_None);
 	return Py_None;
@@ -699,6 +708,9 @@ PyObject* BL_ActionActuator::PySetBlendin(PyObject* self,
 	{
 		m_blendin = blendin;
 	}
+	else {
+		return NULL;
+	}
 	
 	Py_INCREF(Py_None);
 	return Py_None;
@@ -724,6 +736,9 @@ PyObject* BL_ActionActuator::PySetBlendtime(PyObject* self,
 		if (m_blendframe>m_blendin)
 			m_blendframe = m_blendin;
 	}
+	else {
+		return NULL;
+	}
 	
 	Py_INCREF(Py_None);
 	return Py_None;
@@ -745,6 +760,9 @@ PyObject* BL_ActionActuator::PySetPriority(PyObject* self,
 	{
 		m_priority = priority;
 	}
+	else {
+		return NULL;
+	}
 	
 	Py_INCREF(Py_None);
 	return Py_None;
@@ -768,6 +786,9 @@ PyObject* BL_ActionActuator::PySetFrame(PyObject* self,
 		else if (m_localtime>m_endframe)
 			m_localtime=m_endframe;
 	}
+	else {
+		return NULL;
+	}
 	
 	Py_INCREF(Py_None);
 	return Py_None;
@@ -788,6 +809,9 @@ PyObject* BL_ActionActuator::PySetProperty(PyObject* self,
 	{
 		m_propname = string;
 	}
+	else {
+		return NULL;
+	}
 	
 	Py_INCREF(Py_None);
 	return Py_None;
@@ -807,6 +831,9 @@ PyObject* BL_ActionActuator::PySetFrameProperty(PyObject* self,
 	{
 		m_framepropname = string;
 	}
+	else {
+		return NULL;
+	}
 	
 	Py_INCREF(Py_None);
 	return Py_None;
@@ -822,6 +849,9 @@ PyObject* BL_ActionActuator::PyGetChannel(PyObject* self,
 	{
 		m_propname = string;
 	}
+	else {
+		return NULL;
+	}
 	
 	Py_INCREF(Py_None);
 	return Py_None;
@@ -846,7 +876,8 @@ PyObject* BL_ActionActuator::PySetChannel(PyObject* self,
 	int row,col;
 	int	mode = 0;	/* 0 for bone space, 1 for armature/world space */
 	
-	PyArg_ParseTuple(args,"sO|i", &string, &pylist, &mode);
+	if (!PyArg_ParseTuple(args,"sO|i", &string, &pylist, &mode))
+		return NULL;
 	
 	if (pylist->ob_type == &CListValue::Type)
 	{