test-lib-functions.sh: fix the second argument to some helper functions

diff --git a/cache.h b/cache.h
index 9bd8c2d06c80c958b5f654fe16e7294883e49a30..ae0396b84d566108a6b43dfd3ffed3a82f07d2a5 100644 (file)
--- a/cache.h
+++ b/cache.h
@@ -432,6 +432,7 @@ extern char *git_work_tree_cfg;
 extern int is_inside_work_tree(void);
 extern int have_git_dir(void);
 extern const char *get_git_dir(void);
+extern int is_git_directory(const char *path);
 extern char *get_object_directory(void);
 extern char *get_index_file(void);
 extern char *get_graft_file(void);