Remove useless assignment during initialization for some decoders

Originally committed as revision 18680 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/aasc.c

@@ -52,7 +52,6 @@ static av_cold int aasc_decode_init(AVCodecContext *avctx)
     s->avctx = avctx;
 
     avctx->pix_fmt = PIX_FMT_BGR24;
-    s->frame.data[0] = NULL;
 
     return 0;
 }

libavcodec/fraps.c

@@ -63,7 +63,6 @@ static av_cold int decode_init(AVCodecContext *avctx)
     avctx->pix_fmt= PIX_FMT_NONE; /* set in decode_frame */
 
     s->avctx = avctx;
-    s->frame.data[0] = NULL;
     s->tmpbuf = NULL;
 
     dsputil_init(&s->dsp, avctx);

libavcodec/kmvc.c

@@ -346,8 +346,6 @@ static av_cold int decode_init(AVCodecContext * avctx)
 
     c->avctx = avctx;
 
-    c->pic.data[0] = NULL;
-
     if (avctx->width > 320 || avctx->height > 200) {
         av_log(avctx, AV_LOG_ERROR, "KMVC supports frames <= 320x200\n");
         return -1;

libavcodec/qpeg.c

@@ -291,7 +291,6 @@ static av_cold int decode_init(AVCodecContext *avctx){
 
     a->avctx = avctx;
     avctx->pix_fmt= PIX_FMT_PAL8;
-    a->pic.data[0] = NULL;
     a->refdata = av_malloc(avctx->width * avctx->height);
 
     return 0;

libavcodec/smacker.c

@@ -514,8 +514,6 @@ static av_cold int decode_init(AVCodecContext *avctx)
 
     c->avctx = avctx;
 
-    c->pic.data[0] = NULL;
-
     if (avcodec_check_dimensions(avctx, avctx->width, avctx->height) < 0) {
         return 1;
     }

libavcodec/targa.c

@@ -229,7 +229,6 @@ static av_cold int targa_init(AVCodecContext *avctx){
 
     avcodec_get_frame_defaults((AVFrame*)&s->picture);
     avctx->coded_frame= (AVFrame*)&s->picture;
-    s->picture.data[0] = NULL;
 
     return 0;
 }

libavcodec/tiff.c

@@ -512,7 +512,6 @@ static av_cold int tiff_init(AVCodecContext *avctx){
     s->avctx = avctx;
     avcodec_get_frame_defaults((AVFrame*)&s->picture);
     avctx->coded_frame= (AVFrame*)&s->picture;
-    s->picture.data[0] = NULL;
     ff_lzw_decode_open(&s->lzw);
     ff_ccitt_unpack_init();
 

libavcodec/tscc.c

@@ -139,7 +139,6 @@ static av_cold int decode_init(AVCodecContext *avctx)
 
     c->avctx = avctx;
 
-    c->pic.data[0] = NULL;
     c->height = avctx->height;
 
     if (avcodec_check_dimensions(avctx, avctx->width, avctx->height) < 0) {

libavcodec/vmdav.c

@@ -359,8 +359,6 @@ static av_cold int vmdvideo_decode_init(AVCodecContext *avctx)
         palette32[i] = (r << 16) | (g << 8) | (b);
     }
 
-    s->frame.data[0] = s->prev_frame.data[0] = NULL;
-
     return 0;
 }
 

libavcodec/vmnc.c

@@ -465,7 +465,6 @@ static av_cold int decode_init(AVCodecContext *avctx)
 
     c->avctx = avctx;
 
-    c->pic.data[0] = NULL;
     c->width = avctx->width;
     c->height = avctx->height;
 

libavcodec/zmbv.c

@@ -599,7 +599,6 @@ static av_cold int decode_init(AVCodecContext *avctx)
 
     c->avctx = avctx;
 
-    c->pic.data[0] = NULL;
     c->width = avctx->width;
     c->height = avctx->height;
 

libavcodec/zmbvenc.c

@@ -251,7 +251,6 @@ static av_cold int encode_init(AVCodecContext *avctx)
 
     c->avctx = avctx;
 
-    c->pic.data[0] = NULL;
     c->curfrm = 0;
     c->keyint = avctx->keyint_min;
     c->range = 8;