sparse-checkout: free string list in write_cone_to_file()

We use a string list to hold sorted and de-duped patterns, but don't
free it before leaving the function, causing a leak.

This drops the number of leaks found in t7002 from 27 to 25.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/builtin/sparse-checkout.c b/builtin/sparse-checkout.c
index 0f52e252493d0d56fd0bcf5a7b9f92a416e86348..8747191484ef50d68fec07e458493ccb834e4db7 100644 (file)
--- a/builtin/sparse-checkout.c
+++ b/builtin/sparse-checkout.c
@@ -311,6 +311,8 @@ static void write_cone_to_file(FILE *fp, struct pattern_list *pl)
                fprintf(fp, "%s/\n", pattern);
                free(pattern);
        }
+
+       string_list_clear(&sl, 0);
 }
 
 static int write_patterns_and_update(struct pattern_list *pl)