h264: disable checking reader, overreads are not possible

in ffmpegs h264 decoder.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavcodec/h264.c

@@ -25,6 +25,8 @@
  * @author Michael Niedermayer <michaelni@gmx.at>
  */
 
+#define UNCHECKED_BITSTREAM_READER 1
+
 #include "libavutil/imgutils.h"
 #include "libavutil/opt.h"
 #include "internal.h"

libavcodec/h264_cabac.c

@@ -26,6 +26,7 @@
  */
 
 #define CABAC 1
+#define UNCHECKED_BITSTREAM_READER 1
 
 #include "internal.h"
 #include "dsputil.h"

libavcodec/h264_cavlc.c

@@ -26,6 +26,7 @@
  */
 
 #define CABAC 0
+#define UNCHECKED_BITSTREAM_READER 1
 
 #include "internal.h"
 #include "avcodec.h"

libavcodec/h264_parser.c

@@ -25,6 +25,8 @@
  * @author Michael Niedermayer <michaelni@gmx.at>
  */
 
+#define UNCHECKED_BITSTREAM_READER 1
+
 #include "parser.h"
 #include "h264data.h"
 #include "golomb.h"