patch 8.2.3980: if 'operatorfunc' invokes an operator Visual mode is changed

Problem:    If 'operatorfunc' invokes an operator the remembered Visual mode
            may be changed. (Naohiro Ono)
Solution:   Save and restore the information for redoing the Visual area.
            (closes #9455)

src/version.c

@@ -750,6 +750,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    3980,
 /**/
     3979,
 /**/