[PATCH 3/3] gitk: check main window visibility before waiting for it to show

From: Tobias Pietzsch <redacted>

If the main window is already visible when gitk waits for it to
become visible, gitk hangs forever.
This commit adds a check whether the window is already visible.
See https://wiki.tcl-lang.org/page/tkwait+visibility

Signed-off-by: Tobias Pietzsch <redacted>
Signed-off-by: Carlo Marcelo Arenas Belón <redacted>
---
 gitk | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gitk b/gitk
index b62c12f..cc587b5 100755
--- a/gitk
+++ b/gitk

@@ -12664,7 +12664,7 @@ catch {
     wm iconphoto . -default gitlogo gitlogo32
 }
 # wait for the window to become visible
-tkwait visibility .
+if {![winfo viewable .]} {tkwait visibility .}
 set_window_title
 update
 readrefs

-- 
2.33.0.rc0.433.g9a510e7e11