[beta]console log error
I got this error in console when sublime text startup;
my ST version is `3156`,my SublimeLinter version is `4.0.0-rc.9.8`
```
Traceback (most recent call last):
  File "/Applications/Sublime Text.app/Contents/MacOS/sublime_plugin.py", line 210, in on_api_ready
    m.plugin_loaded()
  File "sublime_linter in /Users/johnnyyang/Library/Application Support/Sublime Text 3/Installed Packages/SublimeLinter.sublime-package", line 65, in plugin_loaded
  File "sublime_linter in /Users/johnnyyang/Library/Application Support/Sublime Text 3/Installed Packages/SublimeLinter.sublime-package", line 282, in hit
KeyError: 13
```

```
Traceback (most recent call last):
  File "/Applications/Sublime Text.app/Contents/MacOS/sublime_plugin.py", line 538, in on_activated_async
    callback.on_activated_async(v)
  File "sublime_linter in /Users/johnnyyang/Library/Application Support/Sublime Text 3/Installed Packages/SublimeLinter.sublime-package", line 112, in on_activated_async
  File "sublime_linter in /Users/johnnyyang/Library/Application Support/Sublime Text 3/Installed Packages/SublimeLinter.sublime-package", line 282, in hit
KeyError: 4
```
diff --git a/lint/backend.py b/lint/backend.py
index 76b563f..78af5ec 100644
--- a/lint/backend.py
+++ b/lint/backend.py
@@ -125,7 +125,7 @@ def get_linters(view):
     filename = view.file_name()
     vid = view.id()
 
-    for linter in persist.view_linters.get(vid):
+    for linter in persist.view_linters.get(vid, []):
         # First check to see if the linter can run in the current lint mode.
         if linter.tempfile_suffix == '-' and view.is_dirty():
             continue
diff --git a/sublime_linter.py b/sublime_linter.py
index 5784c5b..ae25e10 100644
--- a/sublime_linter.py
+++ b/sublime_linter.py
@@ -279,7 +279,7 @@ class SublimeLinter(sublime_plugin.EventListener, Listener):
         self.linted_views.add(vid)
 
         if view.size() == 0:
-            for linter in persist.view_linters[vid]:
+            for linter in persist.view_linters.get(vid, []):
                 linter.clear()
             return
 
['sublime_linter.py', 'lint/backend.py']