libtorc-videoui: Remove some C style casts
libtorc-videoui: Convert C style casts in VideoVDPAU
libtorc-core: Fix TorcBonjour host lookups

- MetaCall events were being swallowed in the event method
libtorc-videoui: Uniniatlised var in VideoRendererOpenGL
libtorc-core: Fix a leak in TorcHTTPRequest
libtorc-core: Better fix for leak in TorcHTTPRequest
libtorc-core: Handle aborts while responding in TorcHTTPRequest