builtin-commit.c: guard config parser from value=NULL

commit.template configuration expects a string value.

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

diff --git a/builtin-commit.c b/builtin-commit.c
index 3a47275b8c71ba83ea68107d2430efbf58f24c6e..a43f2019959a950639f013ff534610e228d8c149 100644 (file)
--- a/builtin-commit.c
+++ b/builtin-commit.c
@@ -743,6 +743,8 @@ static void print_summary(const char *prefix, const unsigned char *sha1)
 int git_commit_config(const char *k, const char *v)
 {
        if (!strcmp(k, "commit.template")) {
+               if (!v)
+                       return config_error_nonbool(v);
                template_file = xstrdup(v);
                return 0;
        }