Fix storeMediaFile logic

Currently, when `skip` is true and `deleteExisting` is true the `storeMediaFile` will simply delete the media file. 
However, the intended behavior should be to not touch the media file when both conditions are true.

Author: debanjandhar12

plugin/__init__.py

@@ -650,8 +650,6 @@ def getDeckStats(self, decks):
     def storeMediaFile(self, filename, data=None, path=None, url=None, skipHash=None, deleteExisting=True):
         if not (data or path or url):
             raise Exception('You must provide a "data", "path", or "url" field.')
-        if deleteExisting:
-            self.deleteMediaFile(filename)
         if data:
             mediaData = base64.b64decode(data)
         elif path:
@@ -669,6 +667,8 @@ def storeMediaFile(self, filename, data=None, path=None, url=None, skipHash=None
 
         if skip:
             return None
+        if deleteExisting:
+            self.deleteMediaFile(filename)
         return self.media().writeData(filename, mediaData)