Improve guard so it works for no eof new line

syntax/vbnet.vim

@@ -1,4 +1,5 @@
 if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'vbnet') == -1
+
 " Vim syntax file
 " Language:     VB.NET
 " Maintainer:   Tim Pope <vim@rebelongto.us>
@@ -430,4 +431,5 @@ endif
 let b:current_syntax = "vbnet"
 
 " vim:set ft=vim sts=4 sw=4:
+
 endif