patch 8.2.0178: with VTP the screen may not be restored properly

Problem:    With VTP the screen may not be restored properly.
Solution:   Add another set of saved RGB values. (Nobuhiro Takasaki,
            closes #5548)
diff --git a/src/version.c b/src/version.c
index e6935a2..3d4b1cb 100644
--- a/src/version.c
+++ b/src/version.c
@@ -743,6 +743,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    178,
+/**/
     177,
 /**/
     176,