fix non-lua quads

stepmania/src/Quad.cpp

@@ -5,11 +5,13 @@
 
 REGISTER_ACTOR_CLASS( Quad )
 
+Quad::Quad()
+{
+	Load( TEXTUREMAN->GetDefaultTextureID() );
+}
 
 void Quad::LoadFromNode( const XNode* pNode )
 {
-	Load( TEXTUREMAN->GetDefaultTextureID() );
-
 	// HACK: Bypass Sprite's texture loading.  Sprite should really derive from Quad.
 	Actor::LoadFromNode( pNode );
 }

stepmania/src/Quad.h

@@ -9,6 +9,7 @@
 class Quad : public Sprite
 {
 public:
+	Quad();
 	void LoadFromNode( const XNode* pNode );
 	virtual Quad *Copy() const;
 };