Doc fixes related to face heights. (Bug#2659)

* lisp/faces.el (set-face-attribute): Doc fix.

* src/xfaces.c (Finternal_set_lisp_face_attribute):
Try to clarify some error messages.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/xfaces.c b/src/xfaces.c
index ecd726f4540..e9e677d1b19 100644
--- a/src/xfaces.c
+++ b/src/xfaces.c
@@ -3060,7 +3060,7 @@ FRAME 0 means change the face on all frames, and change the default
             {
               /* The default face must have an absolute size.  */
               if (!INTEGERP (value) || XINT (value) <= 0)
-                signal_error ("Invalid default face height", value);
+                signal_error ("Default face height not absolute and positive", value);
             }
           else
             {
@@ -3070,7 +3070,7 @@ FRAME 0 means change the face on all frames, and change the default
                                                      make_number (10),
                                                      Qnil);
               if (!INTEGERP (test) || XINT (test) <= 0)
-                signal_error ("Invalid face height", value);
+                signal_error ("Face height does not produce a positive integer", value);
             }
         }