Axel Huebl 188b3e6511 hexEscapeChar: restore stream
The ostream passed as reference to `hexEscapeChar` is manipulated
and its original state not restored. This fixes it.

Seen via coverity in a downstream project.
2019-01-10 13:05:36 +01:00
..
2019-01-10 13:05:36 +01:00