fix uninitialized-variable issues (were unused initialized, but triggers some memory checking tools)

src/BulletCollision/CollisionShapes/btSphereShape.h

@@ -29,8 +29,11 @@ public:
 	btSphereShape (btScalar radius) : btConvexInternalShape ()
 	{
 		m_shapeType = SPHERE_SHAPE_PROXYTYPE;
+		m_localScaling.setValue(1.0, 1.0, 1.0);
+		m_implicitShapeDimensions.setZero();
 		m_implicitShapeDimensions.setX(radius);
 		m_collisionMargin = radius;
+		m_padding = 0;
 	}
 	
 	virtual btVector3	localGetSupportingVertex(const btVector3& vec)const;