void luaQ_call(lua_State *L, int na, int nr, QObject *obj = 0)

Perform a Lua function call like lua_call but ensure that the function is executed in the thread owning object obj using thread hopping. Unlike function luaQ_pcall, this function relays Lua errors into the current thread. This is similar to calling 

  if (luaQ_pcall(L,na,nr,0,obj)) 
    lua_error(L);