build: fix some warnings

src/call.cpp

src/data_transfer.cpp

src/jamidht/abstract_sip_transport.h

src/jamidht/account_manager.cpp

src/jamidht/connectionmanager.cpp

src/jamidht/jamiaccount.cpp

src/jamidht/p2p.cpp

src/manager.cpp

src/media/audio/audio_rtp_session.h

src/media/audio/sound/audiofile.cpp

src/plugin/chatservicesmanager.cpp

src/plugin/jamipluginmanager.cpp

src/security/tls_session.cpp

src/sip/sipaccount.cpp

src/sip/sipaccount.h

src/sip/sipaccountbase.cpp

src/sip/sipcall.cpp

src/sip/sippresence.h

src/sip/siptransport.cpp