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

IntelFrameworkModulePkg/Universal/BdsDxe/BootMaint/BootOption.c

@@ -1388,6 +1388,8 @@ BOpt_GetOptionNumber (
                           &gEfiGlobalVariableGuid,
                           &OrderListSize
                           );
+  ASSERT (OrderList != NULL);
+
   for (OptionNumber = 0; ; OptionNumber++) {
     for (Index = 0; Index < OrderListSize / sizeof (UINT16); Index++) {
       if (OptionNumber == OrderList[Index]) {