[PATCH] Avoid warning when bisecting a merge

[Gustaf Hendeby <hendeby@xxxxxxxxxx>]

Trying to compare an empty string as a number results in an error,
hence make sure checkout_done is set before using it.

Signed-off-by: Gustaf Hendeby <hendeby@xxxxxxxxxx>
---

This one should go on top of cc/bisect.

/Gustaf

 git-bisect.sh |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/git-bisect.sh b/git-bisect.sh
index 69a9a56..05d14b3 100755
--- a/git-bisect.sh
+++ b/git-bisect.sh
@@ -437,6 +437,7 @@ bisect_next() {
 		"refs/bisect/skip-*" | tr '\012' ' ') &&
 
 	# Maybe some merge bases must be tested first
+	checkout_done=0
 	check_good_are_ancestors_of_bad "$bad" "$good" "$skip" || exit
 	test "$checkout_done" -eq "1" && checkout_done='' && return
 
-- 
1.6.0.1.320.ga0f13.dirty

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