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)

src/version.c

@@ -769,6 +769,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    775,
 /**/
     774,
 /**/