Impossible to export FB using FORTE Lua exporter

[melekhove]

Steps to reproduce:

• create new FB (composite for example)
• Try to export using '4diac IDE type Export'
• Select exporter 'FORTE Lua'
• Observe the following exception

!MESSAGE InvocationTargetException
!STACK 0
java.lang.reflect.InvocationTargetException
	at org.eclipse.jface.operation.ModalContext.run(ModalContext.java:396)
	...
	at org.eclipse.equinox.launcher.Main.main(Main.java:1454)
Caused by: java.lang.NullPointerException: Cannot invoke "org.eclipse.emf.ecore.EObject.eClass()" because "type" is null
	at org.eclipse.fordiac.ide.export.forte_lua.ForteLuaExportFilter.export(ForteLuaExportFilter.java:68)
	at org.eclipse.fordiac.ide.export.ui.wizard.FordiacExportWizard$Exporter.exportElement(FordiacExportWizard.java:195)
	at org.eclipse.fordiac.ide.export.ui.wizard.FordiacExportWizard$Exporter.run(FordiacExportWizard.java:151)
	at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:124)
Root exception:
java.lang.NullPointerException: Cannot invoke "org.eclipse.emf.ecore.EObject.eClass()" because "type" is null
	at org.eclipse.fordiac.ide.export.forte_lua.ForteLuaExportFilter.export(ForteLuaExportFilter.java:68)
	at org.eclipse.fordiac.ide.export.ui.wizard.FordiacExportWizard$Exporter.exportElement(FordiacExportWizard.java:195)
	at org.eclipse.fordiac.ide.export.ui.wizard.FordiacExportWizard$Exporter.run(FordiacExportWizard.java:151)
	at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:124)

Using code similar to this

4diac-ide/plugins/org.eclipse.fordiac.ide.export/src/org/eclipse/fordiac/ide/export/TemplateExportFilter.java

Lines 111 to 122 in ec93bcf

	if (source == null && typeFile != null && TypeLibraryManager.INSTANCE.getTypeEntryForFile(typeFile) == null) {
	getWarnings().add(MessageFormat.format(Messages.TemplateExportFilter_PREFIX_ERRORMESSAGE_WITH_TYPENAME,
	typeFile.getFullPath(), Messages.TemplateExportFilter_FILE_IGNORED));
	return; // Do not export files passed to the export that are not in the TypeLibrary
	}
	try {
	if (source == null && typeFile != null) {
	final ResourceSet resourceSet = new ResourceSetImpl();
	final Resource resource = resourceSet
	.getResource(URI.createPlatformResourceURI(typeFile.getFullPath().toString(), true), true);
	source = resource.getContents().get(0);
	}

helps