Make syntastic play nice with RVM

vim/settings/syntastic.vim

@@ -6,3 +6,18 @@ let g:syntastic_auto_jump=0
 let g:syntastic_auto_loc_list=1
 "don't care about warnings
 let g:syntastic_quiet_messages = {'level': 'warnings'}
+
+" I have no idea why this is not working, as it used to
+" be a part of syntastic code but was apparently removed
+" This will make syntastic find the correct ruby specified by mri
+function! s:FindRubyExec()
+    if executable("rvm")
+        return system("rvm tools identifier")
+    endif
+
+    return "ruby"
+endfunction
+
+if !exists("g:syntastic_ruby_exec")
+    let g:syntastic_ruby_exec = s:FindRubyExec()
+endif