there are only 4 rematrixing bands

git-svn-id: file:///var/local/repositories/ffmpeg/trunk@9908 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

libavcodec/ac3dec.c

@@ -102,7 +102,7 @@ typedef struct {
     int cplbndstrc[18];
     int rematstr;
     int nrematbnd;
-    int rematflg[AC3_MAX_CHANNELS];
+    int rematflg[4];
     int cplexpstr;
     int lfeexpstr;
     int chexpstr[5];