patch 8.0.0778: in a terminal the cursor may be hidden

Problem:    In a terminal the cursor may be hidden and screen updating lags
            behind. (Nazri Ramliy)
Solution:   Switch the cursor on and flush output when needed. (Ozaki Kiichi)
diff --git a/src/version.c b/src/version.c
index fe82a36..051f75f 100644
--- a/src/version.c
+++ b/src/version.c
@@ -770,6 +770,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    778,
+/**/
     777,
 /**/
     776,