submodule: don't pass empty string arguments to submodule--helper clone

diff --git a/config.c b/config.c
index 647a15ef7258dfedbb221bcacb7b40a30eb9b17e..b95ac3a9cd5ca4fef392a2202f0a5722d15b8dde 100644 (file)
--- a/config.c
+++ b/config.c
@@ -1599,6 +1599,10 @@ int git_config_get_untracked_cache(void)
        int val = -1;
        const char *v;
 
+       /* Hack for test programs like test-dump-untracked-cache */
+       if (ignore_untracked_cache_config)
+               return -1;
+
        if (!git_config_get_maybe_bool("core.untrackedcache", &val))
                return val;