patch 8.2.2521: some compilers can't handle pointer initialization

Problem:    Some compilers can't handle pointer initialization. (John
            Marriott)
Solution:   Use a local struct and assign it afterwards.

src/version.c

@@ -750,6 +750,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2521,
 /**/
     2520,
 /**/