Improve guard so it works for no eof new line

syntax/cpp.vim

@@ -1,4 +1,5 @@
 if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'c/c++') == -1
+
 " Vim syntax file
 " Language:	C++
 " Current Maintainer:	vim-jp (https://github.com/vim-jp/vim-cpp)
@@ -75,4 +76,5 @@ hi def link cppNumber		Number
 let b:current_syntax = "cpp"
 
 " vim: ts=8
+
 endif