Fix more warnings on linux

Source/wtf/HashTable.h

 /*
  * Copyright (C) 2005, 2006, 2007, 2008, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008 David Levin <levin@chromium.org>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 337 matching lines @@
         static void deleteBucket(ValueType& bucket) { bucket.~ValueType(); Traits::constructDeletedValue(bucket); }
 
         FullLookupType makeLookupResult(ValueType* position, bool found, unsigned hash)
             { return FullLookupType(LookupType(position, found), hash); }
 
         iterator makeIterator(ValueType* pos) { return iterator(this, pos, m_table + m_tableSize); }
         const_iterator makeConstIterator(ValueType* pos) const { return const_iterator(this, pos, m_table + m_tableSize); }
         iterator makeKnownGoodIterator(ValueType* pos) { return iterator(this, pos, m_table + m_tableSize, HashItemKnownGood); }
         const_iterator makeKnownGoodConstIterator(ValueType* pos) const { return const_iterator(this, pos, m_table + m_tableSize, HashItemKnownGood); }
 
-        static const int m_maxLoad = 2;
-        static const int m_minLoad = 6;
+        static const unsigned m_maxLoad = 2;
+        static const unsigned m_minLoad = 6;
 
         ValueType* m_table;
         unsigned m_tableSize;
         unsigned m_tableSizeMask;
         unsigned m_keyCount;
         unsigned m_deletedCount;
 
 #if DUMP_HASHTABLE_STATS_PER_TABLE
     public:
         mutable OwnPtr<Stats> m_stats;
@@ skipping 707 matching lines @@
     inline bool operator!=(const HashTableIteratorAdapter<T, U>& a, const HashTableConstIteratorAdapter<T, U>& b)
     {
         return a.m_impl != b.m_impl;
     }
 
 } // namespace WTF
 
 #include "wtf/HashIterators.h"
 
 #endif // WTF_HashTable_h