rtpmp4adepay: don't append an extra 0 byte to the codec data

The audioMuxVersion structure is packed in such a way that the codec
data does not start byte-aligned, which means there's an extra bit of
padding at the end. We don't want that bit in the codec data, since
some decoders seem get confused when they're fed with an extra codec
data byte (also it's just not right of course).

gst/rtp/gstrtpmp4adepay.c

@@ -208,9 +208,9 @@ gst_rtp_mp4a_depay_setcaps (GstBaseRTPDepayload * depayload, GstCaps * caps)
       for (i = 0; i < size; i++) {
         data[i] = ((data[i + 1] & 1) << 7) | ((data[i + 2] & 0xfe) >> 1);
       }
-      /* last bit, this is probably not needed. */
-      data[i] = ((data[i + 1] & 1) << 7);
-      GST_BUFFER_SIZE (buffer) = size + 1;
+
+      /* ignore remaining bit, we're only interested in full bytes */
+      GST_BUFFER_SIZE (buffer) = size;
 
       gst_caps_set_simple (srccaps,
           "codec_data", GST_TYPE_BUFFER, buffer, NULL);