fix xtradb compilation on windows

storage/xtradb/handler/ha_innodb.cc

@@ -13493,17 +13493,15 @@ static MYSQL_SYSVAR_ENUM(stats_method, srv_innodb_stats_method,
 /* Make this variable dynamic for debug builds to
 provide a testcase sync facility */
 #define track_changed_pages_flags PLUGIN_VAR_NOCMDARG
+#define track_changed_pages_check innodb_track_changed_pages_validate
 #else
 #define track_changed_pages_flags PLUGIN_VAR_NOCMDARG | PLUGIN_VAR_READONLY
+#define track_changed_pages_check NULL
 #endif
 static MYSQL_SYSVAR_BOOL(track_changed_pages, srv_track_changed_pages,
   track_changed_pages_flags,
   "Track the redo log for changed pages and output a changed page bitmap",
-#ifdef UNIV_DEBUG
-  innodb_track_changed_pages_validate,
-#else
-  NULL,
-#endif
+  track_changed_pages_check,
   NULL, FALSE);
 
 static MYSQL_SYSVAR_ULONGLONG(max_bitmap_file_size, srv_max_bitmap_file_size,