This fixes the code so it is correct on both sides of the if().

Originally committed as revision 12902 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/aac_ac3_parser.c

@@ -51,11 +51,13 @@ get_next:
             }else{
                 i-= s->header_size -1;
                 s->remaining_size = len;
-                if(!new_frame_start)
+                if(!new_frame_start){
+                    s->remaining_size += i;
                     goto get_next;
                 }
             }
         }
+    }
 
     if(ff_combine_frame(pc, i, &buf, &buf_size)<0){
         s->remaining_size -= FFMIN(s->remaining_size, buf_size);