Make the Vector copy constructor for mismatched inline sizes explicit.

Source/wtf/Vector.h

 /*
  *  Copyright (C) 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
  *
  *  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,
  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 486 matching lines @@
         }
 
         ~Vector()
         {
             if (m_size)
                 shrink(0);
         }
 
         Vector(const Vector&);
         template<size_t otherCapacity>
-        Vector(const Vector<T, otherCapacity>&);
+        explicit Vector(const Vector<T, otherCapacity>&);
 
         Vector& operator=(const Vector&);
         template<size_t otherCapacity>
         Vector& operator=(const Vector<T, otherCapacity>&);
 
 #if COMPILER_SUPPORTS(CXX_RVALUE_REFERENCES)
         Vector(Vector&&);
         Vector& operator=(Vector&&);
 #endif
 
@@ skipping 547 matching lines @@
     inline bool operator!=(const Vector<T, inlineCapacity>& a, const Vector<T, inlineCapacity>& b)
     {
         return !(a == b);
     }
 
 } // namespace WTF
 
 using WTF::Vector;
 
 #endif // WTF_Vector_h