Remove wxLogNull declaration from LoadModule(wxString fname) as it obviated subsequent calls to wxLogDebug().

Add call to wxLog::FlushActive() to end of AudacityApp::OnInit() so calls to wxLog*() in Load*() calls get written to log.

src/AudacityApp.cpp

@@ -1306,6 +1306,8 @@ bool AudacityApp::OnInit()
 
    mWindowRectAlreadySaved = FALSE;
 
+   wxLog::FlushActive(); // Make sure all log messages are written.
+
    return TRUE;
 }