patch 7.4.2221
Problem:    printf() does not support binary format.
Solution:   Add %b and %B. (Ozaki Kiichi)
diff --git a/src/version.c b/src/version.c
index bb933d2..0395201 100644
--- a/src/version.c
+++ b/src/version.c
@@ -764,6 +764,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2221,
+/**/
     2220,
 /**/
     2219,