patch 7.4.770

Problem:    Background color response with transparency is not ignored.
Solution:   Change the way escape sequences are recognized. (partly by
            Hirohito Higashi)

src/version.c

@@ -741,6 +741,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    770,
 /**/
     769,
 /**/