master 39826148d6: * src/fns.c (Fmapconcat): Better empty-string-or-nil detection.

[Mattias Engdegård]

branch: master
commit 39826148d62d88906bea80c310a316312d5e681c
Author: Mattias Engdegård <mattiase@acm.org>
Commit: Mattias Engdegård <mattiase@acm.org>

    * src/fns.c (Fmapconcat): Better empty-string-or-nil detection.
---
 src/fns.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/fns.c b/src/fns.c
index a6ceac2935..4a9954ce90 100644
--- a/src/fns.c
+++ b/src/fns.c
@@ -2836,7 +2836,7 @@ FUNCTION must be a function of one argument, and must 
return a value
   ptrdiff_t nargs = 2 * nmapped - 1;
   eassert (nmapped == leni);
 
-  if (!NILP (Fequal (separator, empty_multibyte_string)))
+  if (NILP (separator) || (STRINGP (separator) && SCHARS (separator) == 0))
     nargs = nmapped;
   else
     {