gitk: Fix display of "(...)" for parents/children we haven't drawn

In the commit details window, we were displaying "(...)" for the
headlines of parents and children that haven't been drawn, without
making any attempt to get those headlines.  This adds a call to
getcommit to commit_descriptor so we get those headlines.

Signed-off-by: Paul Mackerras <paulus@samba.org>

diff --git a/gitk b/gitk
index 4aa57c01ce56e505aba5384f716376a68a7fdc7a..d59debf2f5bb8907cd77fb63f70aa59d6e856602 100755 (executable)
--- a/gitk
+++ b/gitk
@@ -3213,8 +3213,11 @@ proc selcanvline {w x y} {
 
 proc commit_descriptor {p} {
     global commitinfo
+    if {![info exists commitinfo($p)]} {
+       getcommit $p
+    }
     set l "..."
-    if {[info exists commitinfo($p)]} {
+    if {[llength $commitinfo($p)] > 1} {
        set l [lindex $commitinfo($p) 0]
     }
     return "$p ($l)"