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-rw-r--r--xrdp/xrdp_mm.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/xrdp/xrdp_mm.c b/xrdp/xrdp_mm.c
index 10bea994..51a2de85 100644
--- a/xrdp/xrdp_mm.c
+++ b/xrdp/xrdp_mm.c
@@ -2439,7 +2439,7 @@ server_switch_os_surface(struct xrdp_mod *mod, int rdpindex)
bi = xrdp_cache_get_os_bitmap(wm->cache, rdpindex);
- if (bi != 0)
+ if ((bi != 0) && (bi->bitmap != 0))
{
//g_writeln("server_switch_os_surface: setting target_surface to rdpid %d", id);
wm->target_surface = bi->bitmap;