updated for version 7.3.688
Problem:    Python 3.3 is not supported.
Solution:   Add Python 3.3 support (Ken Takata)
diff --git a/src/version.c b/src/version.c
index 7be65c6..d512955 100644
--- a/src/version.c
+++ b/src/version.c
@@ -720,6 +720,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    688,
+/**/
     687,
 /**/
     686,