constness fix in OwnedArray

modules/beast_core/containers/beast_OwnedArray.h

@@ -342,7 +342,7 @@ public:
 
         @param newObject   the new object to add to the array
     */
-    void addIfNotAlreadyThere (const ObjectClass* const newObject) noexcept
+    void addIfNotAlreadyThere (ObjectClass* const newObject) noexcept
     {
         const ScopedLockType lock (getLock());