(face-color-gray-p): Return nil if x-color-values does.

diff --git a/lisp/faces.el b/lisp/faces.el
index d96918cfd0bd621ddabbf8031c25da7db45d48ff..93c4ec5ce2509bc6c74444f27d2af8a32e878e6e 100644 (file)
--- a/lisp/faces.el
+++ b/lisp/faces.el
@@ -139,7 +139,8 @@ FRAME specifies the frame and thus the display for interpreting COLOR."
         (r (nth 0 values))
         (g (nth 1 values))
         (b (nth 2 values)))
-    (and (< (abs (- r g)) (/ (max 1 (abs r) (abs g)) 20))
+    (and values
+        (< (abs (- r g)) (/ (max 1 (abs r) (abs g)) 20))
         (< (abs (- g b)) (/ (max 1 (abs g) (abs b)) 20))
         (< (abs (- b r)) (/ (max 1 (abs b) (abs r)) 20)))))