- fix for crash if drivers were used in the .B.blend

- fix for problem where proxy objects could enter editmode but not exit

source/blender/python/intern/bpy_interface.c

@@ -698,8 +698,13 @@ int BPY_button_eval(bContext *C, char *expr, double *value)
 void BPY_load_user_modules(bContext *C)
 {
 	PyGILState_STATE gilstate;
+	Main *bmain= CTX_data_main(C);
 	Text *text;
 
+	/* can happen on file load */
+	if(bmain==NULL)
+		return;
+
 	bpy_context_set(C, &gilstate);
 
 	for(text=CTX_data_main(C)->text.first; text; text= text->id.next) {