patch 7.4.1552
Problem:    ":colorscheme" does not use 'packpath'.
Solution:   Also use in "start" and "opt" directories in 'packpath'.
diff --git a/src/os_mswin.c b/src/os_mswin.c
index 2a80381..607fd6a 100644
--- a/src/os_mswin.c
+++ b/src/os_mswin.c
@@ -950,7 +950,7 @@
 mch_icon_load(HANDLE *iconp)
 {
     return do_in_runtimepath((char_u *)"bitmaps/vim.ico",
-					      FALSE, mch_icon_load_cb, iconp);
+						  0, mch_icon_load_cb, iconp);
 }
 
     int