updated for version 7.4.622
Problem:    Compiler warning for unused argument.
Solution:   Add UNUSED.
diff --git a/src/version.c b/src/version.c
index be1bee3..4116c72 100644
--- a/src/version.c
+++ b/src/version.c
@@ -742,6 +742,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    622,
+/**/
     621,
 /**/
     620,