"Fix" an issue that would cause the FFMS2 audio provider to crash when fed with a unicode filename/path. The solution involves getting the "short path", no idea if it works on Unix. Fixes bugtracker issues #810 and #808.

Originally committed to SVN as r2826.

aegisub/src/audio_provider_ffmpegsource.cpp

@@ -69,7 +69,7 @@ void FFmpegSourceAudioProvider::LoadAudio(Aegisub::String filename) {
 	// clean up
 	Close();
 
-	wxString FileNameWX(filename.c_str(), wxConvFile);
+	wxString FileNameWX = wxFileName(wxString(filename.c_str(), wxConvFile)).GetShortPath();
 
 	// generate a default name for the cache file
 	wxString CacheName = GetCacheFilename(filename.c_str());