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x11: Fix wrong condition when unsetting transient-for

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Setting a new transient-for parent is only possible if the given parent
window is valid, not when it is NULL or valid.
This commit is contained in:
Timm Bäder 2017-12-19 11:53:31 +01:00
parent 1c3f343baf
commit 964c6f7d58
1 changed files with 1 additions and 1 deletions
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2
gdk/x11/gdkwindow-x11.c
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@ -2453,7 +2453,7 @@ gdk_x11_window_set_transient_for (GdkWindow *window,
return;
/* XSetTransientForHint() doesn't allow unsetting, so do it manually */
if (!parent || !GDK_WINDOW_DESTROYED (parent))
if (parent && !GDK_WINDOW_DESTROYED (parent))
XSetTransientForHint (GDK_WINDOW_XDISPLAY (window),
GDK_WINDOW_XID (window),
GDK_WINDOW_XID (parent));