patch 9.0.0540: assigning stack variable to argument confuses Coverity

Problem:    Assigning stack variable to argument confuses Coverity.
Solution:   Use a local pointer, also makes the code simpler.

src/version.c

@@ -699,6 +699,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    540,
 /**/
     539,
 /**/