Fix search for OEM privileges

This fixes an off-by-one bug in the code which retrieves the OEM Privilege
names.

Tested: Yes, by patching in an OEM privilege and running the code.

Signed-off-by: Joseph Reynolds <joseph-reynolds@charter.net>
Change-Id: I3ea00fffbc62ec7f8c6bf8ff7e2947f19c92dfc8
diff --git a/redfish-core/include/privileges.hpp b/redfish-core/include/privileges.hpp
index e9a24f7..2fa979c 100644
--- a/redfish-core/include/privileges.hpp
+++ b/redfish-core/include/privileges.hpp
@@ -155,7 +155,7 @@
         size_t endIndex = basePrivilegeCount;
         if (type == PrivilegeType::OEM)
         {
-            searchIndex = basePrivilegeCount - 1;
+            searchIndex = basePrivilegeCount;
             endIndex = privilegeNames.size();
         }