(quote_filename): Never return NULL when quoting filenames

as C-strings.  --quote-name was quoting only strings containing
at least one C-quotable character.  Reported by David J. MacKenzie.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/ls.c b/src/ls.c
index 4aeeb08f6..4dd6e6438 100644
--- a/src/ls.c
+++ b/src/ls.c
@@ -2075,7 +2075,7 @@ quote_filename (p, quoted_length)
 	break;
     }
 
-  if (!found_quotable)
+  if (!found_quotable && !quote_as_string)
     {
       *quoted_length = p - p0;
       return NULL;