[PATCH 3/8] am: tighten a conditional that checks for $dotest

We currently assume that, if a $dotest directory exists, an am had
been called earlier.  This assumption might get our conditional to
match a stray $dotest directory created somewhere else, and result in
failures down the line. So, tighten the conditional by additionally
looking for the file $dotest/last.

Signed-off-by: Ramkumar Ramachandra <redacted>
---
 git-am.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/git-am.sh b/git-am.sh
index 88aa438..f4ef8fc 100755
--- a/git-am.sh
+++ b/git-am.sh

@@ -454,7 +454,7 @@ then
    rm -fr "$dotest"
 fi
 
-if test -d "$dotest"
+if test -d "$dotest" && test -f "$dotest/last"
 then
 	case "$#,$skip$resolved$abort" in
 	0,*t*)

-- 
1.8.3.rc1.52.gc14258d