Undo C parts of "Don't use the Gtk region face"

This reverts commit a24f710395f9777cb9f8b000300e5e9c892d7794, apart
from the change to faces.el and NEWS.

1 files changed, 3 insertions, 1 deletions

diff --git a/src/pgtkterm.c b/src/pgtkterm.c
index 54e70255f45..b283cef7cde 100644
--- a/src/pgtkterm.c
+++ b/src/pgtkterm.c
@@ -6913,7 +6913,9 @@ pgtk_defined_color (struct frame *f, const char *name,
   int r;
 
   block_input ();
-  r = pgtk_parse_color (f, name, color_def);
+  r = xg_check_special_colors (f, name, color_def);
+  if (!r)
+    r = pgtk_parse_color (f, name, color_def);
   unblock_input ();
   return r;
 }