updated for version 7.4.644
Problem:    Stratus VOS doesn't have sync().
Solution:   Use fflush(). (Karli Aurelia)
diff --git a/src/version.c b/src/version.c
index e74b125..38f3b78 100644
--- a/src/version.c
+++ b/src/version.c
@@ -742,6 +742,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    644,
+/**/
     643,
 /**/
     642,