decode: fix some uninitialized variable warnings

They're probably not needed, but less noise => faster debugging

git-svn-id: https://svn.musicpd.org/mpd/trunk@7302 09075e82-0dd4-0310-85a5-a0d7c8717e4f

src/pcm_utils.c

@@ -394,7 +394,7 @@ size_t pcm_convertAudioFormat(AudioFormat * inFormat, const char *inBuffer,
                               char *outBuffer, ConvState *convState)
 {
 	const char *buf;
-	size_t len;
+	size_t len = 0;
 	size_t outSize = pcm_sizeOfConvBuffer(inFormat, inSize, outFormat);
 
 	assert(outFormat->bits == 16);