g2m: Relax resolution change constraints

Do not fail when original resolution is smaller than current one,
as the frame buffer is resized automatically.

Signed-off-by: Vittorio Giovara <vittorio.giovara at gmail.com>

libavcodec/g2meet.c

@@ -1410,8 +1410,7 @@ static int g2m_decode_frame(AVCodecContext *avctx, void *data,
             }
             c->width  = bytestream2_get_be32(&bc);
             c->height = bytestream2_get_be32(&bc);
-            if (c->width  < 16 || c->width  > c->orig_width ||
-                c->height < 16 || c->height > c->orig_height) {
+            if (c->width < 16 || c->height < 16) {
                 av_log(avctx, AV_LOG_ERROR,
                        "Invalid frame dimensions %dx%d\n",
                        c->width, c->height);