Fix one peculiar case in Smacker decoding.

Patch by Daniel Verkamp ($firstname <at> drv <dot> nu)
Thread [PATCH] Smacker video decoder bug fix

Originally committed as revision 16143 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/smacker.c

@@ -457,8 +457,8 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, const
                 case 2:
                     for(i = 0; i < 2; i++) {
                         uint16_t pix1, pix2;
-                        pix1 = smk_get_code(&gb, smk->full_tbl, smk->full_last);
                         pix2 = smk_get_code(&gb, smk->full_tbl, smk->full_last);
+                        pix1 = smk_get_code(&gb, smk->full_tbl, smk->full_last);
                         AV_WL16(out,pix1);
                         AV_WL16(out+2,pix2);
                         out += stride;