coverity#1233488 Unchecked dynamic_cast

Change-Id: I9599fb4473a43a4624d64c48e8768761fcbd266f

test/source/primitive2dxmldump.cxx

@@ -94,7 +94,8 @@ void Primitive2dXmlDump::decomposeAndWrite(
     {
         drawinglayer::primitive2d::Primitive2DReference xPrimitive2DReference = rPrimitive2DSequence[i];
         const BasePrimitive2D* pBasePrimitive = dynamic_cast<const BasePrimitive2D* >(xPrimitive2DReference.get());
-
+        if (!pBasePrimitive)
+            continue;
         sal_uInt32 nId = pBasePrimitive->getPrimitive2DID();
         if (maFilter[nId])
             continue;