More cgptlib tests

firmware/lib/cgptlib/cgptlib_internal.c

Index: firmware/lib/cgptlib/cgptlib_internal.c
diff --git a/firmware/lib/cgptlib/cgptlib_internal.c b/firmware/lib/cgptlib/cgptlib_internal.c
index a0c1688649e074d9326088008645c0aa0b6c09e0..ee3c87f18365adb6592d6d04a762057e2a4ed707 100644
--- a/firmware/lib/cgptlib/cgptlib_internal.c
+++ b/firmware/lib/cgptlib/cgptlib_internal.c
@@ -152,6 +152,10 @@ int CheckEntries(GptEntry* entries, GptHeader* h) {
       if ((entry->ending_lba >= e2->starting_lba) &&
           (entry->ending_lba <= e2->ending_lba))
         return 1;
+
+      /* UniqueGuid field must be unique. */
+      if (0 == Memcmp(&entry->unique, &e2->unique, sizeof(Guid)))
+        return 1;
     }
   }