MmSafeCopyFromUser as source files need these but don't want internal
mm definitions.
* ntoskrnl/nt/ntevent.c (NtCreateEvent, NtOpenEvent, NtPulseEvent,
NtQueryEvent, NtResetEvent, NtSetEvent): Copy data to and from user mode
safely.
* ntoskrnl/rtl/mem.c (MmCopyToCaller, MmCopyFromCaller): Helper functions
for copying data to and from potentially unsafe pointers.
svn path=/trunk/; revision=1698