updated for version 7.3.669

Problem:    When building with Cygwin loading Python dynamically fails.
Solution:   Use DLLLIBRARY instead of INSTSONAME. (Ken Takata)

src/version.c

@@ -719,6 +719,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    669,
 /**/
     668,
 /**/