Fix too narrow requirement for loading known grasps

source/RobotAPI/libraries/armem_grasping/server/KnownGraspProviderSegment.cpp

@@ -66,9 +66,10 @@ namespace armarx::armem::grasping::segment
                     retGrasp.quality = std::stof(graspNode.attribute_value("quality"));
                     retGrasp.creator = graspNode.attribute_value("Creation");
 
-                    ARMARX_CHECK_EQUAL(graspNode.nodes().size(), 1);
+                    ARMARX_CHECK(graspNode.nodes().size() == 2 or graspNode.nodes().size() == 1);
                     RapidXmlReaderNode transformNode = graspNode.nodes()[0];
 
+                    ARMARX_CHECK_EQUAL(transformNode.name(), "Transform");
                     ARMARX_CHECK_EQUAL(transformNode.nodes().size(), 1);
                     RapidXmlReaderNode matrixNode = transformNode.nodes()[0];