fix crash in opengl backend

Change-Id: I1257f4568e55ca545e96bda8a53f272ba8e1f0b0

chart2/source/view/inc/DummyXShape.hxx

@@ -100,7 +100,7 @@ class DummyChart;
 
 struct OpenglContext;
 
-class DummyXShape : public cppu::WeakImplHelper6<
+class DummyXShape : public cppu::WeakAggImplHelper6<
                     ::com::sun::star::drawing::XShape,
                     com::sun::star::beans::XPropertySet,
                     com::sun::star::beans::XMultiPropertySet,
@@ -364,6 +364,7 @@ class DummyXShapes : public DummyXShape, public com::sun::star::drawing::XShapes
 public:
 
     virtual ::com::sun::star::uno::Any SAL_CALL queryInterface( const ::com::sun::star::uno::Type & rType ) throw(::com::sun::star::uno::RuntimeException);
+    virtual com::sun::star::uno::Any SAL_CALL queryAggregation( const com::sun::star::uno::Type& rType ) throw(::com::sun::star::uno::RuntimeException);
     virtual void SAL_CALL acquire() throw();
     virtual void SAL_CALL release() throw();
 

chart2/source/view/main/DummyXShape.cxx

@@ -396,12 +396,29 @@ DummyChart* DummyChart::getRootShape()
     return this;
 }
 
+#define QUERYINT( xint ) \
+    if( rType == ::getCppuType((const uno::Reference< xint >*)0) ) \
+        aAny <<= uno::Reference< xint >(this)
+
 uno::Any DummyXShapes::queryInterface( const uno::Type& rType )
     throw(uno::RuntimeException)
 {
     return DummyXShape::queryInterface(rType);
 }
 
+uno::Any DummyXShapes::queryAggregation( const uno::Type & rType )
+    throw(uno::RuntimeException)
+{
+    uno::Any aAny;
+
+    //QUERYINT( drawing::XShapeGroup );
+    QUERYINT( drawing::XShapes );
+    else
+        return DummyXShape::queryAggregation( rType );
+
+    return aAny;
+}
+
 void DummyXShapes::acquire()
     throw()
 {