set pix_fmt properly depending on version

git-svn-id: file:///var/local/repositories/ffmpeg/trunk@10095 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

libavcodec/4xm.c

@@ -787,7 +787,8 @@ static int decode_init(AVCodecContext *avctx){
     common_init(avctx);
     init_vlcs(f);
 
-    avctx->pix_fmt= PIX_FMT_RGB565;
+    if(f->version) avctx->pix_fmt= PIX_FMT_RGB565;
+    else           avctx->pix_fmt= PIX_FMT_RGB555;
 
     return 0;
 }