[BUG/PATCH] git grep shows the same hit repeatedly for unmerged paths

[Junio C Hamano <gitster@pobox.com>]

When the index is unmerged, e.g.

	$ git ls-files -u
        100644 faf413748eb6ccb15161a212156c5e348302b1b6 1	setup.c
        100644 145eca50f41d811c4c8fcb21ed2604e6b2971aba 2	setup.c
        100644 cb9558c49b6027bf225ba2a6154c4d2a52bcdbe2 3	setup.c

running "git grep" for work tree files repeats hits for each unmerged
stage.

	$ git grep -n -e setup_work_tree -- '*.[ch]'
        setup.c:209:void setup_work_tree(void)
        setup.c:209:void setup_work_tree(void)
        setup.c:209:void setup_work_tree(void)

This should fix it.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
---

 builtin-grep.c |   12 ++++++------
 1 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/builtin-grep.c b/builtin-grep.c
index bbf747f..f1ff8dc 100644
--- a/builtin-grep.c
+++ b/builtin-grep.c
@@ -343,12 +343,12 @@ static int external_grep(struct grep_opt *opt, const char **paths, int cached)
 			memcpy(name + 2, ce->name, len + 1);
 		}
 		argv[argc++] = name;
-		if (argc < MAXARGS)
-			continue;
-		status = flush_grep(opt, argc, nr, argv, &kept);
-		if (0 < status)
-			hit = 1;
-		argc = nr + kept;
+		if (MAXARGS <= argc) {
+			status = flush_grep(opt, argc, nr, argv, &kept);
+			if (0 < status)
+				hit = 1;
+			argc = nr + kept;
+		}
 		if (ce_stage(ce)) {
 			do {
 				i++;