sub_mb_type[] needs to be 8-byte aligned because it is referenced

as a uint64_t in get_dct8x8_allowed().
Patch by David S. Miller <davem at davemloft dot net>

Originally committed as revision 17655 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/h264.h

@@ -350,7 +350,7 @@ typedef struct H264Context{
     int mb_field_decoding_flag;
     int mb_mbaff;              ///< mb_aff_frame && mb_field_decoding_flag
 
-    uint16_t sub_mb_type[4];
+    DECLARE_ALIGNED_8(uint16_t, sub_mb_type[4]);
 
     //POC stuff
     int poc_lsb;