Merge remote-tracking branch 'qatar/master'

* qatar/master:
  go2meeting: disallow tile dimensions that are not multiple of 16
Merged-by: Michael Niedermayer <michaelni@gmx.at>

libavcodec/g2meet.c

@@ -713,7 +713,8 @@ static int g2m_decode_frame(AVCodecContext *avctx, void *data,
             }
             c->tile_width  = bytestream2_get_be32(&bc);
             c->tile_height = bytestream2_get_be32(&bc);
-            if (!c->tile_width || !c->tile_height) {
+            if (!c->tile_width || !c->tile_height ||
+                ((c->tile_width | c->tile_height) & 0xF)) {
                 av_log(avctx, AV_LOG_ERROR,
                        "Invalid tile dimensions %dx%d\n",
                        c->tile_width, c->tile_height);