RS if name of the file uploaded is null

2016-12-08 15:22:00,379 [ajp-nio2-8010-exec-74] ERROR OLATRuntimeException - OLAT::ERROR ^%^ N10-E277

https://xyz.openolat.com/auth/RepositoryEntry/84082699/CourseNode/87888133325569 ^%^ Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2704.79 Safari/537.36 Edge/14.14393

**RedScreen** null

<dispatchinfo>
	<componentinfo>
		<compname>ffo_main_file_upload</compname>
		<compclass>org.olat.core.gui.components.form.flexible.impl.FormWrapperContainer</compclass>
		<extendedinfo>n/a</extendedinfo>
		<event>
			<class>org.olat.core.gui.components.form.flexible.impl.FormEvent</class>
			<command>ONCHANGE</command>
			<tostring>com:ONCHANGE,org.olat.core.gui.components.form.flexible.impl.FormEvent@a30cee6e</tostring>
		</event>
	</componentinfo>
	<controllerinfo>
		<controllername>org.olat.core.commons.modules.bc.FileUploadController</controllername>
		<controllername>org.olat.core.commons.modules.bc.commands.CmdUpload</controllername>
		<controllername>org.olat.core.commons.modules.bc.FolderRunController</controllername>
		<controllername>org.olat.course.nodes.bc.BCCourseNodeRunController</controllername>
		<controllername>org.olat.course.run.RunMainController</controllername>
		<controllername>org.olat.course.run.CourseRuntimeController</controllername>
		<controllername>org.olat.core.commons.fullWebApp.BaseFullWebappController</controllername>
	</controllerinfo>
</dispatchinfo>

>>> stack of 1.cause::org.olat.core.logging.OLATRuntimeException: null
-> at org.olat.core.gui.exception.ExceptionWindowController.<init>(ExceptionWindowController.java:116)
   at org.olat.core.gui.exception.MsgFactory.createMessageChiefController(MsgFactory.java:57)
   at org.olat.core.gui.exception.MsgFactory.createMessageChiefController(MsgFactory.java:46)
   at org.olat.core.gui.components.Window.dispatchRequest(Window.java:547)
   at org.olat.core.gui.components.Window.doDispatchRequest(Window.java:240)
   at org.olat.core.gui.components.AbstractComponent.dispatchRequest(AbstractComponent.java:193)
   at org.olat.dispatcher.AuthenticatedDispatcher.processValidDispatchURI(AuthenticatedDispatcher.java:275)
   at org.olat.dispatcher.AuthenticatedDispatcher.execute(AuthenticatedDispatcher.java:192)
   at org.olat.core.servlets.OpenOLATServlet.executeUserRequest(OpenOLATServlet.java:289)
   at org.olat.core.servlets.OpenOLATServlet.doPost(OpenOLATServlet.java:232)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:648)
>>> stack of 2.cause::java.lang.NullPointerException: null
-> at org.olat.core.util.FileUtils.normalizeFilename(FileUtils.java:840)
   at org.olat.core.commons.modules.bc.FileUploadController.formInnerEvent(FileUploadController.java:313)
   at org.olat.core.gui.components.form.flexible.impl.FormBasicController.event(FormBasicController.java:421)
   at org.olat.core.gui.control.DefaultController.dispatchEvent(DefaultController.java:202)
   at org.olat.core.gui.components.AbstractComponent$1.run(AbstractComponent.java:240)
   at org.olat.core.logging.activity.ThreadLocalUserActivityLoggerInstaller.runWithUserActivityLogger(ThreadLocalUserActivityLoggerInstaller.java:108)
   at org.olat.core.gui.components.AbstractComponent.fireEvent(AbstractComponent.java:238)
   at org.olat.core.gui.components.form.flexible.impl.FormWrapperContainer.fireFormEvent(FormWrapperContainer.java:148)
   at org.olat.core.gui.components.form.flexible.impl.Form.fireFormEvent(Form.java:781)
   at org.olat.core.gui.components.form.flexible.impl.FormItemImpl.doDispatchFormRequest(FormItemImpl.java:553)
   at org.olat.core.gui.components.form.flexible.impl.Form.evalFormRequest(Form.java:304)