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)
diff --git a/src/version.c b/src/version.c
index 638e350..36f79b1 100644
--- a/src/version.c
+++ b/src/version.c
@@ -765,6 +765,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    174,
+/**/
     173,
 /**/
     172,