patch 7.4.1812

Problem:    Failure on startup with Athena and Motif.
Solution:   Check for INVALCOLOR. (Kazunobu Kuriyama)

src/version.c

@@ -753,6 +753,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1812,
 /**/
     1811,
 /**/