Transmission: Don't use ratio when not filled in.

couchpotato/core/downloaders/transmission/main.py

@@ -38,9 +38,10 @@ class Transmission(Downloader):
             'download-dir': folder_path
         }
 
+        if self.conf('ratio'):
             torrent_params = {
                 'seedRatioLimit': self.conf('ratio'),
-            'seedRatioMode': (0 if self.conf('ratio') else 1)
+                'seedRatioMode': self.conf('ratio')
             }
 
         if not filedata and data.get('type') == 'torrent':