Update HiiFont Service to return error status instead of ASSERT for the invalid input.

Signed-off-by: Liming Gao <liming.gao@intel.com>
Reviewed-by: Eric Dong <eric.dong@intel.com>


git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@13209 6f19259b-4bc3-4df7-8a09-765794883524
1 file changed