Change plugin guard for disabling, fixes #371

indent/cmake.vim

@@ -1,5 +1,7 @@
-if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'cmake') == -1
-  
+if exists('g:polyglot_disabled') && index(g:polyglot_disabled, 'cmake') != -1
+  finish
+endif
+
 " Vim indent file
 " Language:     CMake (ft=cmake)
 " Author:       Andy Cedilnik <andy.cedilnik@kitware.com>
@@ -89,5 +91,3 @@ endfun
 
 let &cpo = s:keepcpo
 unlet s:keepcpo
-
-endif