Skip empty track segments in GPX

[briedis]

Endomondo sometimes export empty track segments. This will handle cases when empty segments may exist.

[Sibyx]

Hello, thank you very much for your PR. Can you please add also a configuration option for this feature? You can still skip empty segments by default, but we should add possibility to bypass this behavior.

[briedis]

Hmm, are you sure? Because if a segment is empty, it fails with a fatal error when you try to access time on a null node.

This is the error:

1) phpGPX\Tests\LoadRouteFileTest::testRouteFileWithSmoothedStats
Trying to get property 'time' of non-object

/Users/briedis/web/phpGPX/src/phpGPX/Models/Track.php:118
/Users/briedis/web/phpGPX/src/phpGPX/Parsers/TrackParser.php:93
/Users/briedis/web/phpGPX/src/phpGPX/phpGPX.php:128
/Users/briedis/web/phpGPX/src/phpGPX/phpGPX.php:104
/Users/briedis/web/phpGPX/tests/LoadRouteFileTest.php:34

[Sibyx]

Okay than, thank you very much for contribution!

[briedis]

Would you mind if I auto-format the source to PSR1/2 standard, and rename the class to StudlyCase ? (first letter uppercase). In a separate PR, of course.

[Sibyx]

Sure, go for it ;) Also, run the php-cs-fixer there was an issue in your last PR