Improve guard so it works for no eof new line

syntax/vala.vim

@@ -1,4 +1,5 @@
 if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'vala') == -1
+
 " Vim syntax file
 " Language:	Vala
 " Maintainers:	Emmanuele Bassi <ebassi@gnome.org>
@@ -225,4 +226,5 @@ let &cpo = s:vala_cpo_save
 unlet s:vala_cpo_save
 
 " vim: ts=8
+
 endif