Merge remote-tracking branch 'qatar/master'

* qatar/master:
  aac: check the maximum number of channels

Merged-by: Michael Niedermayer <michaelni@gmx.at>

libavcodec/aacdec.c

@@ -148,6 +148,8 @@ static av_cold int che_configure(AACContext *ac,
                                  enum ChannelPosition che_pos,
                                  int type, int id, int *channels)
 {
+    if (*channels >= MAX_CHANNELS)
+        return AVERROR_INVALIDDATA;
     if (che_pos) {
         if (!ac->che[type][id]) {
             if (!(ac->che[type][id] = av_mallocz(sizeof(ChannelElement))))