difftool --no-index: error out on --dir-diff (and don't crash)

diff --git a/apply.c b/apply.c
index 892ede5a318f751c80fcceab036a8cbaee391774..f15afa9f6af98ae41af60eb2296ee35d38ccc7fd 100644 (file)
--- a/apply.c
+++ b/apply.c
@@ -56,6 +56,10 @@ static int parse_whitespace_option(struct apply_state *state, const char *option
                state->ws_error_action = correct_ws_error;
                return 0;
        }
+       /*
+        * Please update $__git_whitespacelist in git-completion.bash
+        * when you add new options.
+        */
        return error(_("unrecognized whitespace option '%s'"), option);
 }