Exit gracefully when there are errors during initialization.

common/single_top.cpp

@@ -288,9 +288,8 @@ bool PGM_SINGLE_TOP::OnPgmInit( wxApp* aWxApp )
             // We've already initialized things at this point, but wx won't call OnExit if
             // we fail out. Call our own cleanup routine here to ensure the relevant resources
             // are freed at the right time (if they aren't, segfaults will occur).
-#if defined( KICAD_SCRIPTING_WXPYTHON )
             OnPgmExit();
-#endif
+
             // Fail the process startup if the file could not be opened,
             // although this is an optional choice, one that can be reversed
             // also in the KIFACE specific OpenProjectFiles() return value.