updated for version 7.3.1221
Problem:    When build flags change "make distclean" run into a configure
            error.
Solution:   When CFLAGS changes delete auto/config.cache.  Also avoid adding
            duplicate text to flags.
diff --git a/src/version.c b/src/version.c
index 3ff8203..b8545f5 100644
--- a/src/version.c
+++ b/src/version.c
@@ -729,6 +729,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1221,
+/**/
     1220,
 /**/
     1219,