updated for version 7.4.189
Problem:    Compiler warning for unused argument.
Solution:   Add UNUSED.
diff --git a/src/version.c b/src/version.c
index 09ee63b..077b132 100644
--- a/src/version.c
+++ b/src/version.c
@@ -739,6 +739,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    189,
+/**/
     188,
 /**/
     187,