gitk: Avoid crash if closed while reading references

diff --git a/gitk b/gitk
index 488286f6a1751da8c079c83260d38787a391d603..dca1741c71254175d2161c1fd58091077f6087fd 100755 (executable)
--- a/gitk
+++ b/gitk
@@ -11128,6 +11128,7 @@ catch {
 # wait for the window to become visible
 tkwait visibility .
 wm title . "[file tail $argv0]: [file tail [pwd]]"
+update
 readrefs
 
 if {$cmdline_files ne {} || $revtreeargs ne {} || $revtreeargscmd ne {}} {