Oliver Woodman 72d42fbc9f Fix an issue where retrying WebM extraction failed.
The ID_SEGMENT can only be read once, as seeing the element a second time is
assumed to indicate that the file contains multiple segment elements (which is
not supported).

This change allows the element to be read twice if it is at the same position,
so that retrying loading from the start can succeed.
2015-07-15 11:15:21 +01:00
..
2015-05-28 17:19:30 +01:00