added additional parameterchecks to MRFAngleDriveType, MRFRetarderType and MRFTorqueLimitationsType

VectoCore/VectoCore/OutputData/XML/DeclarationReports/ManufacturerReport/ManufacturerReport_0_9/ManufacturerReportXMLTypeWriter/Components/MRFAngleDriveType.cs

@@ -20,6 +20,9 @@ namespace TUGraz.VectoCore.OutputData.XML.DeclarationReports.ManufacturerReport.
 		public XElement GetElement(IDeclarationInputDataProvider inputData)
 		{
 			var angleDriveData = inputData.JobInputData.Vehicle.Components.AngledriveInputData;
+			if (angleDriveData == null || angleDriveData.Type == AngledriveType.None) {
+				return null;
+			}
 			return new XElement(_mrf + XMLNames.Component_Angledrive,
 				new XElement(_mrf + XMLNames.Component_Model, angleDriveData.Model),
 				new XElement(_mrf + XMLNames.Component_CertificationNumber, angleDriveData.CertificationNumber),

VectoCore/VectoCore/OutputData/XML/DeclarationReports/ManufacturerReport/ManufacturerReport_0_9/ManufacturerReportXMLTypeWriter/Components/MRFRetarderType.cs

@@ -19,6 +19,9 @@ namespace TUGraz.VectoCore.OutputData.XML.DeclarationReports.ManufacturerReport.
 		public XElement GetElement(IDeclarationInputDataProvider inputData)
 		{
 			var retarderData = inputData.JobInputData.Vehicle.Components.RetarderInputData;
+			if (retarderData == null || retarderData.Type == RetarderType.None) {
+				return null;
+			}
 			var result = new XElement(_mrf + XMLNames.Component_Retarder,
 				new XElement(_mrf + XMLNames.Component_Model,
 					inputData.JobInputData.Vehicle.Components.RetarderInputData.Model),

VectoCore/VectoCore/OutputData/XML/DeclarationReports/ManufacturerReport/ManufacturerReport_0_9/ManufacturerReportXMLTypeWriter/Components/MRFTorqueLimitationsType.cs

@@ -15,7 +15,7 @@ namespace TUGraz.VectoCore.OutputData.XML.DeclarationReports.ManufacturerReport.
 
 		public XElement GetElement(IDeclarationInputDataProvider inputData)
 		{
-			if (inputData.JobInputData.Vehicle.TorqueLimits == null) {
+			if (inputData.JobInputData.Vehicle.TorqueLimits == null || inputData.JobInputData.Vehicle.TorqueLimits.Count == 0) {
 
 				return null;
 			}