updated for version 7.3.712
Problem:    Nmake from VS2010 SP1 is not recognized.
Solution:   Add the version number. (Ken Takata)
diff --git a/src/version.c b/src/version.c
index 7968b72..87d0e62 100644
--- a/src/version.c
+++ b/src/version.c
@@ -726,6 +726,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    712,
+/**/
     711,
 /**/
     710,