gitk: Fix display of branch names on some commits

diff --git a/gitk b/gitk
index bc73eea518f551251c56511c239e6d73857bc5a9..eead5a48d85c5c8db47df2c82fea5718216808d6 100755 (executable)
--- a/gitk
+++ b/gitk
@@ -10582,13 +10582,13 @@ proc anctags {id} {
 # including id itself if it has a head.
 proc descheads {id} {
     global arcnos arcstart arcids archeads idheads cached_dheads
-    global allparents
+    global allparents arcout
 
     if {![info exists allparents($id)]} {
        return {}
     }
     set aret {}
-    if {[llength $arcnos($id)] == 1 && [llength $allparents($id)] == 1} {
+    if {![info exists arcout($id)]} {
        # part-way along an arc; check it first
        set a [lindex $arcnos($id) 0]
        if {$archeads($a) ne {}} {