callmodel: currentCall_ must be reset if holded
callmodel: currentCall_ must be reset if holded

forget current call when state == PAUSE in order to make
possible the setCurrentCall afterwards

Change-Id: I663a951d1981f49d52ee7725a8f440d83ade4d61

savoirfairelinux/ring-lrc,savoirfairelinux/ring-lrc,savoirfairelinux/ring-lrc,savoirfairelinux/ring-lrc,savoirfairelinux/ring-lrc