Fix bug: alloca wrong size for audio buffer.

ChangeLog

@@ -1,6 +1,7 @@
 User johns
 Date:
 
+    Fix bug: alloca wrong size for audio buffer.
     Handle jump in stream like stream start.
     Always compile audio drift correction.
     Add audio drift correction configuration to the setup.

audio.c

@@ -3561,7 +3561,7 @@ void AudioEnqueue(const void *samples, int count)
     frames =
 	count / (AudioRing[AudioRingWrite].InChannels * AudioBytesProSample);
     buffer =
-	alloca(frames * AudioRing[AudioRingWrite].InChannels *
+	alloca(frames * AudioRing[AudioRingWrite].HwChannels *
 	AudioBytesProSample);
     AudioResample(samples, AudioRing[AudioRingWrite].InChannels, frames,
 	buffer, AudioRing[AudioRingWrite].HwChannels);