updated for version 7.4.451
Problem:    Calling system() with empty input gives an error for writing the
            temp file.
Solution:   Do not try writing if the string length is zero. (Olaf Dabrunz)
diff --git a/src/version.c b/src/version.c
index a6a1017..fa2ced9 100644
--- a/src/version.c
+++ b/src/version.c
@@ -742,6 +742,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    451,
+/**/
     450,
 /**/
     449,