updated for version 7.3.667
Problem:    Unused variables in Perl interface.
Solution:   Adjust #ifdefs.
diff --git a/src/version.c b/src/version.c
index 95404c4..4c93e3a 100644
--- a/src/version.c
+++ b/src/version.c
@@ -720,6 +720,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    667,
+/**/
     666,
 /**/
     665,