Fix more warnings on linux

Source/wtf/HashTable.h

Index: Source/wtf/HashTable.h
diff --git a/Source/wtf/HashTable.h b/Source/wtf/HashTable.h
index a839f6d31d041898a4ead60e61733f185137d71c..c7fc9bd5a88c2bb32a2da66d173e45141a0344e7 100644
--- a/Source/wtf/HashTable.h
+++ b/Source/wtf/HashTable.h
@@ -355,8 +355,8 @@ namespace WTF {
         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;