patch 7.4.720
Problem:    Can't build with Visual Studio 2015.
Solution:   Recognize the "version 14" numbers and omit /nodefaultlib when
            appropriate. (Paul Moore)
diff --git a/src/version.c b/src/version.c
index 61bd602..8e0edfb 100644
--- a/src/version.c
+++ b/src/version.c
@@ -742,6 +742,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    720,
+/**/
     719,
 /**/
     718,