[DEV] Reader2: protect resenders with a mutex
[DEV] Reader2: protect resenders with a mutex

Change-Id: I649c3b09d4e1f5c974b2331bde4d078742822dfc
Reviewed-on: https://gerrit.parrot.biz/23851
Reviewed-by: Nicolas Brulez <c7b4d7ddc34318e865922d5ddc9ce680dfb1b14c@parrot.com>

Parrot-Developers/libARStream,Parrot-Developers/libARStream,Parrot-Developers/libARStream