iswspace: fix handling of 0

diff --git a/src/ctype/iswspace.c b/src/ctype/iswspace.c
index 99d517e..b0c0ae1 100644 (file)
--- a/src/ctype/iswspace.c
+++ b/src/ctype/iswspace.c
@@ -14,6 +14,5 @@ int iswspace(wint_t wc)
                0x2006, 0x2008, 0x2009, 0x200a,
                0x2028, 0x2029, 0x205f, 0x3000, 0
        };
-       if (wcschr(spaces, wc)) return 1;
-       return 0;
+       return wc && wcschr(spaces, wc);
 }