initialize all elements in initOutputBuffer()

The current OutputBuffer object is allocated statically, i.e. it is
zeroed.  To be safe for other cases in the future, also initialize the
other elements.

git-svn-id: https://svn.musicpd.org/mpd/trunk@7337 09075e82-0dd4-0310-85a5-a0d7c8717e4f

src/outputBuffer.c

@@ -28,6 +28,8 @@ void initOutputBuffer(OutputBuffer * cb, unsigned int size)
 	memset(&cb->convState, 0, sizeof(ConvState));
 	cb->chunks = xmalloc(size * sizeof(*cb->chunks));
 	cb->size = size;
+	cb->begin = 0;
+	cb->end = 0;
 	cb->currentChunk = -1;
 }