patch 8.0.0775: in a terminal the cursor is updated too often

Problem:    In a terminal the cursor is updated too often.
Solution:   Only flush when needed. (Yasuhiro Matsumoto).  Remeber whether the
            cursor is visible. (closes #1873)
diff --git a/src/version.c b/src/version.c
index 59f5a90..c48806a 100644
--- a/src/version.c
+++ b/src/version.c
@@ -770,6 +770,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    775,
+/**/
     774,
 /**/
     773,