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-rw-r--r--src/core/window-props.c11
1 files changed, 6 insertions, 5 deletions
diff --git a/src/core/window-props.c b/src/core/window-props.c
index 3414a3d9..b27809ab 100644
--- a/src/core/window-props.c
+++ b/src/core/window-props.c
@@ -309,11 +309,12 @@ get_local_pid (MetaWindow *window)
spec.client = window->xwindow;
spec.mask = XRES_CLIENT_ID_PID_MASK;
- XResQueryClientIds (window->display->xdisplay,
- 1,
- &spec,
- &num_ids,
- &client_ids);
+ if (!XResQueryClientIds (window->display->xdisplay,
+ 1,
+ &spec,
+ &num_ids,
+ &client_ids))
+ return pid;
for (i = 0; i < num_ids; i++)
{