Add max allowed subpackets in multichannel cook

git-svn-id: file:///var/local/repositories/ffmpeg/trunk@17991 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

libavcodec/cook.c

@@ -61,6 +61,7 @@
 #define MC_COOK         0x2000000   //multichannel Cook, not supported
 
 #define SUBBAND_SIZE    20
+#define MAX_SUBPACKETS   5
 //#define COOKDEBUG
 
 typedef struct {