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-rw-r--r--src/ctype/iswspace.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/src/ctype/iswspace.c b/src/ctype/iswspace.c
index 99d517e6..b0c0ae18 100644
--- 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);
 }