commit: fix a segfault when displaying a commit with unreachable parents

diff --git a/git-fetch.sh b/git-fetch.sh
index f1522bd49a2fc1c3106c6b2ed0a38af0a9ff72de..79222fbb1a4bf3205f3225feafc96aa43aace87c 100755 (executable)
--- a/git-fetch.sh
+++ b/git-fetch.sh
@@ -436,10 +436,10 @@ esac
 
 # If the original head was empty (i.e. no "master" yet), or
 # if we were told not to worry, we do not have to check.
-case ",$update_head_ok,$orig_head," in
-*,, | t,* )
+case "$orig_head" in
+'')
        ;;
-*)
+?*)
        curr_head=$(git-rev-parse --verify HEAD 2>/dev/null)
        if test "$curr_head" != "$orig_head"
        then