fix missing extern, include

panda/src/gobj/LOD.cxx

@@ -27,6 +27,7 @@
 #define NAME LODSwitchVector
 
 #include <vector_src.cxx>
+#include "config_gobj.h"
 
 ////////////////////////////////////////////////////////////////////
 // Static variables

panda/src/gobj/config_gobj.h

@@ -45,6 +45,7 @@ extern EXPCL_PANDA const string fake_texture_image;
 extern EXPCL_PANDA const bool debug_number_mode;
 extern EXPCL_PANDA const int select_LOD_number;
 extern EXPCL_PANDA const int minimum_LOD_number;
+extern EXPCL_PANDA const bool debug_LOD_mode;
 
 #endif