updated for version 7.3.691
Problem:    State specific to the Python thread is discarded.
Solution:   Keep state between threads. (Paul)
diff --git a/src/version.c b/src/version.c
index 01d6793..2d9529c 100644
--- a/src/version.c
+++ b/src/version.c
@@ -720,6 +720,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    691,
+/**/
     690,
 /**/
     689,