For BdsDxe module,
1. Fix the risk that local variable is pointed by global pointer, which may be used outside the variable scope.
2. Add more checking for pointers.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10536 6f19259b-4bc3-4df7-8a09-765794883524
4 files changed