- registering new python classes runs the free functions on existing classes.

- print an error if RNA Structs are freed with a python pointer set to help with debugging leaks.
- fix for unlikely eternal loop in unit conversion.

source/blender/python/intern/bpy_interface.c

@@ -270,10 +270,14 @@ void BPY_start_python( int argc, char **argv )
 
 void BPY_end_python( void )
 {
+	fprintf(stderr, "Ending Python!\n");
+
 	PyGILState_Ensure(); /* finalizing, no need to grab the state */
 	
 	// free other python data.
-	//BPY_rna_free_types();
+	pyrna_free_types();
+
+	/* clear all python data from structs */
 	
 	Py_Finalize(  );
 	
@@ -292,6 +296,8 @@ void BPY_end_python( void )
 
 	printf("\n");
 
+	fprintf(stderr, "Ending Python Done!\n");
+
 #endif
 
 }