output: removed audio_output.sameInAndOutFormats

Eliminate sameInAndOutFormats and check with audio_format_equals()
each time it this information is needed.  Another 4 bytes saved.

src/output_api.h

@@ -66,7 +66,6 @@ struct audio_output {
 	ConvState convState;
 	char *convBuffer;
 	size_t convBufferLen;
-	int sameInAndOutFormats;
 
 	void *data;
 };

src/output_control.c

@@ -44,10 +44,6 @@ int audio_output_open(struct audio_output *audioOutput,
 	if (!audioOutput->open)
 		ret = audioOutput->plugin->open(audioOutput);
 
-	audioOutput->sameInAndOutFormats =
-		audio_format_equals(&audioOutput->inAudioFormat,
-		                    &audioOutput->outAudioFormat);
-
 	return ret;
 }
 
@@ -82,9 +78,9 @@ int audio_output_play(struct audio_output *audioOutput,
 	if (!audioOutput->open)
 		return -1;
 
-	if (!audioOutput->sameInAndOutFormats) {
+	if (!audio_format_equals(&audioOutput->inAudioFormat,
+				 &audioOutput->outAudioFormat))
 		convertAudioFormat(audioOutput, &playChunk, &size);
-	}
 
 	ret = audioOutput->plugin->play(audioOutput, playChunk, size);
 

src/output_init.c

@@ -86,7 +86,6 @@ int audio_output_init(struct audio_output *ao, ConfigParam * param)
 	ao->plugin = plugin;
 	ao->open = 0;
 
-	ao->sameInAndOutFormats = 0;
 	ao->convBuffer = NULL;
 	ao->convBufferLen = 0;