lnxgameController::flush accesses this->m_MouseActive before that
member being initialized with something sensible, making ASAN report:
linux/lnxcontroller.cpp:259:8: runtime error: load of value 190, which is not a valid value for type 'bool'
linux/lnxcontroller.cpp:259:33: runtime error: load of value 190, which is not a valid value for type 'bool'
Thanks to the introduction of mem_rmalloc, it has been established
that struct lnxgameController is not malloc'd anywhere, so any
instantiation runs its constructor properly.
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