Don't free Context from python.

There might be a better way to do this, Cambo, please check.

This solves the Totblock == -1 error

source/blender/python/intern/bpy_rna.c

@@ -320,9 +320,12 @@ static void pyrna_struct_dealloc( BPy_StructRNA * self )
 {
 	if (self->freeptr && self->ptr.data) {
 		IDP_FreeProperty(self->ptr.data);
+		if (self->ptr.type != &RNA_Context)
+		{
 			MEM_freeN(self->ptr.data);
 			self->ptr.data= NULL;
 		}
+	}
 
 	/* Note, for subclassed PyObjects we cant just call PyObject_DEL() directly or it will crash */
 	Py_TYPE(self)->tp_free(self);