avcodec/flac_parser: Increase FLAC_MAX_SEQUENTIAL_HEADERS by 1

Fixes Ticket5343
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

libavcodec/flac_parser.c

@@ -40,7 +40,7 @@
 #include "flac.h"
 
 /** maximum number of adjacent headers that compare CRCs against each other   */
-#define FLAC_MAX_SEQUENTIAL_HEADERS 3
+#define FLAC_MAX_SEQUENTIAL_HEADERS 4
 /** minimum number of headers buffered and checked before returning frames    */
 #define FLAC_MIN_HEADERS 10
 /** estimate for average size of a FLAC frame                                 */