fix padding in btSolverConstraint, see Issue 650

fix some warnings

src/BulletCollision/CollisionShapes/btConvexPointCloudShape.cpp

@@ -44,7 +44,7 @@ btVector3	btConvexPointCloudShape::localGetSupportingVertexWithoutMargin(const b
     if( m_numPoints > 0 )
     {
         // Here we take advantage of dot(a*b, c) = dot( a, b*c) to do less work. Note this transformation is true mathematically, not numerically.
-        btVector3 scaled = vec * m_localScaling;
+    //    btVector3 scaled = vec * m_localScaling;
         int index = (int) vec.maxDot( &m_unscaledPoints[0], m_numPoints, maxDot);   //FIXME: may violate encapsulation of m_unscaledPoints
         return getScaledPoint(index);
     }

src/BulletCollision/CollisionShapes/btStridingMeshInterface.cpp

@@ -242,7 +242,7 @@ const char*	btStridingMeshInterface::serialize(void* dataBuffer, btSerializer* s
 		int gfxindex;
 	//	btVector3 triangle[3];
 
-		btVector3 meshScaling = getScaling();
+	//	btVector3 meshScaling = getScaling();
 
 		///if the number of parts is big, the performance might drop due to the innerloop switch on indextype
 		for (part=0;part<graphicssubparts ;part++,memPtr++)