patch 8.0.0174: executing "locale -a" on MS-Windows needlessly

Problem:    For completion "locale -a" is executed on MS-Windows, even though
            it most likely won't work.
Solution:   Skip executing "locale -a" on MS-Windows. (Ken Takata)

src/version.c

@@ -764,6 +764,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    174,
 /**/
     173,
 /**/