[PATCH] git-mergetool--lib.sh: make check_unchanged return 1 on invalid read

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Else when the user hits ctrl-c at the "Was the merge successful?
[y/n]" prompt, mergetool goes into an infinite loop asking
for input.

Signed-off-by: Jay Soffian <jaysoffian@xxxxxxxxx>
---
 git-mergetool--lib.sh |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)

diff --git a/git-mergetool--lib.sh b/git-mergetool--lib.sh
index 8fc65d0400..0eb424484c 100644
--- a/git-mergetool--lib.sh
+++ b/git-mergetool--lib.sh
@@ -21,7 +21,11 @@ check_unchanged () {
 		do
 			echo "$MERGED seems unchanged."
 			printf "Was the merge successful? [y/n] "
-			read answer
+			if ! read answer
+			then
+				status=1
+				break
+			fi
 			case "$answer" in
 			y*|Y*) status=0; break ;;
 			n*|N*) status=1; break ;;
-- 
1.7.7.rc2.2.gf185

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