Incorrect parsing of xml with comments

[RShabanov]

Hello everyone! If I try to parse an xml string with comments, it doesn't work correctly for some kml tags. I assume it doesn't work correctly for those tags that are read in methods with _ => break in the scope of the loop. For example, in KmlReader::read_location

loop {
    let mut e = self.reader.read_event_into(&mut self.buf)?;
    match e {
        Event::Start(ref mut e) => match e.local_name().as_ref() {
            b"longitude" => longitude = self.read_float()?,
            b"latitude" => latitude = self.read_float()?,
            b"altitude" => altitude = self.read_float()?,
            _ => {}
        },
        Event::End(ref mut e) => {
            if e.local_name().as_ref() == b"Location" {
                break;
            }
        }
        _ => break, // it breaks even if it is a comment tag
    }
}

If you try to parse, for instance, such kml string

<Location>
  <!-- my comment -->
  <longitude>39.55375305703105</longitude> 
  <latitude>-118.9813220168456</latitude> 
  <altitude>1223</altitude>
</Location>

You will get this

KmlDocument(
    KmlDocument {
        version: Unknown,
        attrs: {},
        elements: [
            Location(
                Location {
                    latitude: 0.0,
                    longitude: 0.0,
                    altitude: 0.0,
                    attrs: {},
                },
            ),
            Element(
                Element {
                    name: "longitude",
                    attrs: {},
                    content: Some(
                        "39.55375305703105",
                    ),
                    children: [],
                },
            ),
            Element(
                Element {
                    name: "latitude",
                    attrs: {},
                    content: Some(
                        "-118.9813220168456",
                    ),
                    children: [],
                },
            ),
            Element(
                Element {
                    name: "altitude",
                    attrs: {},
                    content: Some(
                        "1223",
                    ),
                    children: [],
                },
            ),
        ],
    },
)

When it is expected to be something like

Location(
    Location {
        latitude: -118.9813220168456,
        longitude: 39.55375305703105,
        altitude: 1223.0,
        attrs: {},
    },
)

[pjsier]

@RShabanov thanks for the issue! This is a great catch, and it should be a simple fix. I can get started on that now