Fix compiler warning (Apple LLVM version 10.0.1; clang-1001.0.46.4):
In file included from …/source/lobby/glooxwrapper/glooxwrapper.cpp:20:
…/source/lobby/glooxwrapper/glooxwrapper.h:642:10:warning: private field 'm_Owned' is not used [-Wunused-private-field]
It appears to have been unused since its introduction in rP19703.