LiveStream: destroy object when not needed

Signed-off-by: Rafał Malinowski <rafal.malinowski@corp.bluecherry.net>
Bug #148 fixed: log do not show server passwords anymore

Signed-off-by: Rafał Malinowski <rafal.malinowski@corp.bluecherry.net>
Merge pull request #142 from vogel/misc-fixes

LiveStream: destroy object when not needed
Merge pull request #149 from vogel/fix-148

Bug #148 fixed: log do not show server passwords anymore