avcodec/utils: Merge identical if conditions

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

libavcodec/utils.c

@@ -864,8 +864,7 @@ static int get_buffer_internal(AVCodecContext *avctx, AVFrame *frame, int flags)
             av_log(avctx, AV_LOG_ERROR, "video_get_buffer: image parameters invalid\n");
             return AVERROR(EINVAL);
         }
-    }
+
-    if (avctx->codec_type == AVMEDIA_TYPE_VIDEO) {
         if (frame->width <= 0 || frame->height <= 0) {
             frame->width  = FFMAX(avctx->width,  AV_CEIL_RSHIFT(avctx->coded_width,  avctx->lowres));
             frame->height = FFMAX(avctx->height, AV_CEIL_RSHIFT(avctx->coded_height, avctx->lowres));