updated for version 7.3.666

Problem:    With MSVC 11 Win32.mak is not found.
Solution:   Add the SDK_INCLUDE_DIR variable. (Raymond Ko)

src/version.c

@@ -719,6 +719,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    666,
 /**/
     665,
 /**/