Fixed: Display an error if unable to open a ogg file

--HG--
branch : develop

code/nel/src/sound/audio_decoder.cpp

@@ -110,15 +110,18 @@ bool IAudioDecoder::getInfo(const std::string &filepath, std::string &artist, st
 		CIFile ifile; 
 		ifile.setCacheFileOnOpen(false); 
 		ifile.allowBNPCacheFileOnOpen(false);
-		ifile.open(lookup);
+		if (ifile.open(lookup))
 			return CAudioDecoderVorbis::getInfo(&ifile, artist, title);
+
+		nlwarning("Unable to open: '%s'", filepath.c_str());
 	}
 	else
 	{
 		nlwarning("Music file type unknown: '%s'", type_lower.c_str());
+	}
+
 	artist.clear(); title.clear();
 	return false;
-	}
 }
 
 /// Get audio/container extensions that are currently supported by the nel sound library.