Updated plugins

sources_non_forked/syntastic/syntax_checkers/python/py3kwarn.vim

@@ -14,14 +14,16 @@ let s:save_cpo = &cpo
 set cpo&vim
 
 function! SyntaxCheckers_python_py3kwarn_GetLocList() dict
-    let makeprg = self.makeprgBuild({
-        \ 'exe_before': (syntastic#util#isRunningWindows() ? '' : 'TERM=dumb') })
+    let makeprg = self.makeprgBuild({})
 
     let errorformat = '%W%f:%l:%c: %m'
 
+    let env = syntastic#util#isRunningWindows() ? {} : { 'TERM': 'dumb' }
+
     return SyntasticMake({
         \ 'makeprg': makeprg,
-        \ 'errorformat': errorformat })
+        \ 'errorformat': errorformat,
+        \ 'env': env })
 endfunction
 
 call g:SyntasticRegistry.CreateAndRegisterChecker({