5dc6ab1 Set the free buffer pointer to NULL to avoid later free again.

1 file Authored by Eric Dong 10 years ago, Committed by ydong10 10 years ago,
    Set the free buffer pointer to NULL to avoid later free again.
    
    Contributed-under: TianoCore Contribution Agreement 1.0
    Signed-off-by: Eric Dong <eric.dong@intel.com>
    Reviewed-by: Liming Gao <liming.gao@intel.com>
    
    git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@15232 6f19259b-4bc3-4df7-8a09-765794883524