Align mb_bit_buffer and vs_bit_buffer as their alignment is checked by assert().

Originally committed as revision 21164 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/dv.c

@@ -533,8 +533,8 @@ static int dv_decode_video_segment(AVCodecContext *avctx, void *arg)
     GetBitContext gb;
     BlockInfo mb_data[5 * DV_MAX_BPM], *mb, *mb1;
     DECLARE_ALIGNED_16(DCTELEM, sblock[5*DV_MAX_BPM][64]);
-    uint8_t mb_bit_buffer[80 + 4]; /* allow some slack */
-    uint8_t vs_bit_buffer[5 * 80 + 4]; /* allow some slack */
+    DECLARE_ALIGNED_16(uint8_t, mb_bit_buffer[80 + 4]); /* allow some slack */
+    DECLARE_ALIGNED_16(uint8_t, vs_bit_buffer[5 * 80 + 4]); /* allow some slack */
     const int log2_blocksize = 3-s->avctx->lowres;
     int is_field_mode[5];