Try next on failed trailer download

couchpotato/core/plugins/trailer.py

@@ -32,7 +32,7 @@ class Trailer(Plugin):
             destination = os.path.join(group['destination_dir'], filename)
             if not os.path.isfile(destination):
                 trailer_file = fireEvent('file.download', url = trailer, dest = destination, urlopen_kwargs = {'headers': {'User-Agent': 'Quicktime'}}, single = True)
-                if os.path.getsize(trailer_file) < (1024 * 1024):  # Don't trust small trailers (1MB), try next one
+                if trailer_file and os.path.getsize(trailer_file) < (1024 * 1024):  # Don't trust small trailers (1MB), try next one
                     os.unlink(trailer_file)
                     continue
             else: