+ bugfix in btAlignedObjectArray, not calling destructors on resize to smaller array.

Thanks Benoit for pointing this out, and bugfix: http://code.google.com/p/bullet/issues/detail?id=218

+ Added point to point, hinge, slider and generic 6dof constraints to Maya Dynamica plugin
Thanks to Herbert Law for the constribution: http://code.google.com/p/bullet/issues/detail?id=221

Extras/MayaPlugin/constraint/constraint.h

@@ -0,0 +1,52 @@
+/*
+Bullet Continuous Collision Detection and Physics Library Maya Plugin
+Copyright (c) 2008 Walt Disney Studios
+ 
+This software is provided 'as-is', without any express or implied warranty.
+In no event will the authors be held liable for any damages arising
+from the use of this software.
+Permission is granted to anyone to use this software for any purpose,
+including commercial applications, and to alter it and redistribute it freely,
+subject to the following restrictions:
+ 
+1. The origin of this software must not be misrepresented; you must
+not claim that you wrote the original software. If you use this
+software in a product, an acknowledgment in the product documentation
+would be appreciated but is not required.
+2. Altered source versions must be plainly marked as such, and must
+not be misrepresented as being the original software.
+3. This notice may not be removed or altered from any source distribution.
+ 
+Written by: Nicola Candussi <nicola@fluidinteractive.com>
+*/
+
+//constraint.h
+
+#ifndef DYN_CONSTRAINT_H
+#define DYN_CONSTRAINT_H
+
+#include "shared_ptr.h"
+#include "constraint_impl.h"
+
+class constraint_t
+{
+public:
+    //typedefs
+    typedef shared_ptr<constraint_t> pointer;
+
+public:
+    virtual ~constraint_t() {}
+
+protected:
+    friend class solver_t;
+
+    constraint_t(constraint_impl_t* impl): m_impl(impl) { }
+
+    constraint_impl_t* impl()              { return m_impl.get(); }
+    constraint_impl_t const* impl() const  { return m_impl.get(); }
+    
+protected:
+    shared_ptr<constraint_impl_t> m_impl;
+};
+
+#endif