The pointer argument should be set to NULL if not used not FALSE.
  FALSE evaluates to 0. This was flagged by LLVM compiler as a
  warning:
  "expression which evaluates to zero treated as a null pointer
   constant of type 'EFI_MTFTP4_OVERRIDE_DATA *'
   [-Wnon-literal-null-conversion]"

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Harry Liebel <Harry.Liebel@arm.com>
Reviewed-By: Olivier Martin <olivier.martin@arm.com>
Reviewed-By: Fu, Siyuan <siyuan.fu@intel.com>
Reviewed-By: Ye, Ting (ting.ye@intel.com)

git-svn-id: svn://svn.code.sf.net/p/edk2/code/trunk/edk2/MdeModulePkg@15741 6f19259b-4bc3-4df7-8a09-765794883524