Always parse target duration as integer

Following the HLS spec, target duration is an integer
value.

Author: mauricioabreu

m3u8/parser.py

@@ -452,7 +452,7 @@ def _parse_byterange(line, state, **kwargs):
 
 
 def _parse_targetduration(**parse_kwargs):
-    return _parse_simple_parameter(cast_to=float, **parse_kwargs)
+    return _parse_simple_parameter(cast_to=int, **parse_kwargs)
 
 
 def _parse_media_sequence(**parse_kwargs):

tests/playlists.py

@@ -65,7 +65,7 @@
 
 PLAYLIST_WITH_NON_INTEGER_DURATION = """
 #EXTM3U
-#EXT-X-TARGETDURATION:5220.5
+#EXT-X-TARGETDURATION:5221
 #EXTINF:5220.5,
 http://media.example.com/entire.ts
 """

tests/test_parser.py

@@ -28,7 +28,7 @@ def test_should_parse_simple_playlist_from_string():
 
 def test_should_parse_non_integer_duration_from_playlist_string():
     data = m3u8.parse(playlists.PLAYLIST_WITH_NON_INTEGER_DURATION)
-    assert 5220.5 == data["targetduration"]
+    assert 5221 == data["targetduration"]
     assert [5220.5] == [c["duration"] for c in data["segments"]]