patch 8.2.3544: Unix: may leak file descriptor using non-existing directory

Problem:    Unix: may leak file descriptor when using a non-existing
            directory.
Solution:   Always close the file. (closes #9023)

src/version.c

@@ -757,6 +757,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    3544,
 /**/
     3543,
 /**/