patch 8.0.0919: cursor color isn't set on startup

Problem:    Cursor color isn't set on startup.
Solution:   Initialize showing_mode to invalid value.

src/version.c

@@ -769,6 +769,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    919,
 /**/
     918,
 /**/