patch 8.2.2248: ASAN error on exit with GUI

Problem:    ASAN error on exit with GUI.
Solution:   Check the window still has lines. (Christian Brabandt,
            closes #7573)

src/version.c

@@ -750,6 +750,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2248,
 /**/
     2247,
 /**/