updated for version 7.3.775

Problem:    Cygwin and Mingw builds miss dependency on gui_w48.c.
Solution:   Add a build rule. (Ken Takata)

src/version.c

@@ -725,6 +725,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    775,
 /**/
     774,
 /**/