updated for version 7.3.666
Problem:    With MSVC 11 Win32.mak is not found.
Solution:   Add the SDK_INCLUDE_DIR variable. (Raymond Ko)
diff --git a/src/version.c b/src/version.c
index 0452d92..95404c4 100644
--- a/src/version.c
+++ b/src/version.c
@@ -720,6 +720,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    666,
+/**/
     665,
 /**/
     664,