[PATCH GITK 2/6] gitk: Internal: drawtags: Idempotently reset "ntags"

The previous code tracked its change to the length of `marks' by
updateing the variable `ntags'.  This is a bit fragile and cumbersome,
and we are going to want to modify `marks' some more in a moment.

Instead, simply reset ntags to the length of marks, after we have
possibly done any needed abbreviation.

No functional change.

Signed-off-by: Ian Jackson <redacted>
---
 gitk | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/gitk b/gitk
index 42fa41a..31aecda 100755
--- a/gitk
+++ b/gitk

@@ -6575,9 +6575,10 @@ proc drawtags {id x xt y1} {
 	    } else {
 		set marks [list [format "%d tags..." $ntags]]
 	    }
-	    set ntags 1
 	}
     }
+    set ntags [llength $marks]
+
     if {[info exists idheads($id)]} {
 	set marks [concat $marks $idheads($id)]
 	set nheads [llength $idheads($id)]

-- 
2.10.1