Change Core Audio file handler priority

Now it should take priority for all supported formats, including MP3, so that reported broken file should play properly now. Not fixing FFmpeg outside of FFmpeg, someone can report the file to FFmpeg if they want to.

Plugins/CoreAudio/CoreAudioDecoder.m

@@ -258,7 +258,7 @@ static SInt64 getSizeProc(void* clientData) {
 
 + (float)priority
 {
-    return 0.5;
+    return 1.5;
 }
 
 - (NSDictionary *)properties