Fix setup(loop=None)

Caught in issue #24.

aionotify/base.py

@@ -88,7 +88,7 @@ async def setup(self, loop=None):
             self._setup_watch(alias, path, flags)
 
         # We pass ownership of the fd to the transport; it will close it.
-        self._stream, self._transport = await aioutils.stream_from_fd(self._fd, loop)
+        self._stream, self._transport = await aioutils.stream_from_fd(self._fd, self._loop)
 
     def close(self):
         """Schedule closure.

tests/test_usage.py

@@ -101,6 +101,19 @@ async def test_watch_before_start(self):
         # And it's over.
         await self._assert_no_events()
 
+    async def test_watch_before_start_default_loop(self):
+        """A watch call is valid before startup."""
+        self.watcher.watch(self.testdir, aionotify.Flags.CREATE)
+        await self.watcher.setup()
+
+        # Touch a file: we get the event.
+        self._touch('a')
+        event = await self.watcher.get_event()
+        self._assert_file_event(event, 'a')
+
+        # And it's over.
+        await self._assert_no_events()
+
     async def test_watch_after_start(self):
         """A watch call is valid after startup."""
         await self.watcher.setup(self.loop)