updated for version 7.3.326

Problem:    MingW 4.6 no longer supports the -mno-cygwin option.
Solution:   Split the Cygwin and MingW makefiles. (Matsushita Shougo)

src/version.c

@@ -709,6 +709,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    326,
 /**/
     325,
 /**/