"fix struct out param" (#229)

Author: gangatp

Build/build.bat

@@ -3,7 +3,7 @@ set startingDir="%CD%"
 set basepath="%~dp0"
 
 cd %basepath%\..\Source
-set Sources=actutils.go automaticcomponenttoolkit.go buildbindingccpp.go buildbindingccppdocumentation.go buildbindingcsharp.go buildbindinggo.go buildbindingnode.go buildbindingpascal.go buildbindingpython.go buildimplementationcpp.go buildbindingjava.go buildimplementationpascal.go componentdefinition.go componentdiff.go languagewriter.go languagec.go languagecpp.go languagepascal.go
+set Sources=actutils.go automaticcomponenttoolkit.go buildbindingccpp.go buildbindingccppdocumentation.go buildbindingcsharp.go buildbindinggo.go buildbindingnode.go buildbindingpascal.go buildbindingpython.go buildbindingwasm.go buildbindingjava.go buildimplementationcpp.go buildimplementationpascal.go componentdefinition.go componentdiff.go languagewriter.go languagec.go languagecpp.go languagepascal.go
 
 set GOOS=windows
 set GOARCH=amd64

Source/buildbindingpython.go

@@ -1005,7 +1005,7 @@ func writeMethod(method ComponentDefinitionMethod, w LanguageWriter, NameSpace s
 				{
 				outParamsSig = append(outParamsSig, param.ParamName+" = None")
 
-				preCallLines = append(preCallLines, fmt.Sprintf("%s = %s(%s if %s else %s())", cParams[0].ParamName, cParams[0].ParamCallType, param.ParamName, param.ParamName, cParams[0].ParamCallType))
+				preCallLines = append(preCallLines, fmt.Sprintf("%s = %s if %s is not None else %s()", cParams[0].ParamName, param.ParamName, param.ParamName, cParams[0].ParamCallType))
 				cArguments = cArguments + cParams[0].ParamName
 				cCheckArguments = cCheckArguments  + cParams[0].ParamName