patch 8.0.1289: mkview always includes the local directory

Problem:    Mkview always includes the local directory.
Solution:   Add the "curdir" value in 'viewoptions'. (Eric Roberts, closes
            #2316)
diff --git a/src/ex_docmd.c b/src/ex_docmd.c
index 547d1ac..84a72e1 100644
--- a/src/ex_docmd.c
+++ b/src/ex_docmd.c
@@ -11695,9 +11695,11 @@
     }
 
     /*
-     * Local directory.
+     * Local directory, if the current flag is not view options or the "curdir"
+     * option is included.
      */
-    if (wp->w_localdir != NULL)
+    if (wp->w_localdir != NULL
+			    && (flagp != &vop_flags || (*flagp & SSOP_CURDIR)))
     {
 	if (fputs("lcd ", fd) < 0
 		|| ses_put_fname(fd, wp->w_localdir, flagp) == FAIL