patch 9.1.1043: [security]: segfault in win_line()

Problem:  [security]: segfault in win_line()
          (fizz-is-on-the-way)
Solution: Check that ScreenLines is not NULL

Github Advisory:
https://github.com/vim/vim/security/advisories/GHSA-j3g9-wg22-v955

Signed-off-by: Christian Brabandt <cb@256bit.org>

src/version.c

@@ -704,6 +704,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1043,
 /**/
     1042,
 /**/