updated for version 7.4.540

Problem:    Cannot build with tiny and small features. (Taro Muraoka)
Solution:   Add #ifdef around CMD_USER.

src/version.c

@@ -741,6 +741,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    540,
 /**/
     539,
 /**/