[#22045] Memory leak in Mathutils.Matrix

own fault when adding mathutils callbacks, generic destructor didnt free the matrix accessor array, made the array apart of the matrix struct since its not worth malloc'ing to save at most 16bytes.

source/blender/python/generic/mathutils_matrix.h

@@ -34,21 +34,14 @@
 
 extern PyTypeObject matrix_Type;
 #define MatrixObject_Check(_v) PyObject_TypeCheck((_v), &matrix_Type)
+#define MATRIX_MAX_DIM 4
 
-typedef float **ptRow;
-typedef struct _Matrix { /* keep aligned with BaseMathObject in mathutils.h */
-	PyObject_VAR_HEAD
-	float *contigPtr;	/*1D array of data (alias)*/
-	PyObject *cb_user;	/* if this vector references another object, otherwise NULL, *Note* this owns its reference */
-	unsigned char cb_type;	/* which user funcs do we adhere to, RNA, GameObject, etc */
-	unsigned char cb_subtype;	/* subtype: location, rotation... to avoid defining many new functions for every attribute of the same type */
-	unsigned char wrapped;	/*is wrapped data?*/
-	/* end BaseMathObject */
+typedef struct {
+	BASE_MATH_MEMBERS(contigPtr);
 
 	unsigned char rowSize;
 	unsigned int colSize;
-	ptRow			matrix;		/*ptr to the contigPtr (accessor)*/
-
+	float *matrix[MATRIX_MAX_DIM];		/* ptr to the contigPtr (accessor) */
 } MatrixObject;
 
 /*struct data contains a pointer to the actual data that the