merge-recursive: Fix multiple file rename across D/F conflict

In 5a2580d (merge_recursive: Fix renames across paths below D/F conflicts
2010-07-09), detection was added for renames across paths involved in a
directory<->file conflict.  However, the change accidentally involved
reusing an outer loop index ('i') in an inner loop, changing its values
and causing a slightly different type of breakage for cases where there are
multiple renames across the D/F conflict.  Fix by creating a new temporary
variable 'i'.

Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

merge-recursive.c

@@ -1020,6 +1020,7 @@ static int process_renames(struct merge_options *o,
 				if (mfi.clean &&
 				    sha_eq(mfi.sha, ren1->pair->two->sha1) &&
 				    mfi.mode == ren1->pair->two->mode) {
+					int i;
 					/*
 					 * This message is part of
 					 * t6022 test. If you change

t/t6031-merge-recursive.sh

@@ -57,7 +57,7 @@ test_expect_success FILEMODE 'verify executable bit on file' '
 	test -x file2
 '
 
-test_expect_failure 'merging with triple rename across D/F conflict' '
+test_expect_success 'merging with triple rename across D/F conflict' '
 	git reset --hard HEAD &&
 	git checkout -b main &&
 	git rm -rf . &&