adding lacking include to aac3_parser.c

git-svn-id: file:///var/local/repositories/ffmpeg/trunk@12572 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

libavcodec/aac_parser.c

@@ -23,6 +23,7 @@
 #include "parser.h"
 #include "aac_ac3_parser.h"
 #include "bitstream.h"
+#include "ac3.h"
 
 
 #define AAC_HEADER_SIZE 7