#861 Bug after indexing a new folder

[Alexandros]

program.name=DocFetcher
program.version=1.1.12
program.build=20140925-0039
program.portable=true
java.runtime.name=Java(TM) SE Runtime Environment
java.runtime.version=1.7.0_71-b14
java.version=1.7.0_71
sun.arch.data.model=64
os.arch=x86_64
os.name=Mac OS X
os.version=10.10
user.language=el
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at net.sourceforge.docfetcher.Main.main(Main.java:32)
Caused by: java.lang.NullPointerException
at org.eclipse.swt.widgets.Tree.checkData(Unknown Source)
at org.eclipse.swt.widgets.Tree.outlineView_objectValueForTableColumn_byItem(Unknown Source)
at org.eclipse.swt.widgets.Display.windowProc(Unknown Source)
at org.eclipse.swt.internal.cocoa.OS.objc_msgSend(Native Method)
at org.eclipse.swt.internal.cocoa.NSWindow.makeKeyAndOrderFront(Unknown Source)
at org.eclipse.swt.widgets.Shell.makeKeyAndOrderFront(Unknown Source)
at org.eclipse.swt.widgets.Shell.setWindowVisible(Unknown Source)
at org.eclipse.swt.widgets.Shell.open(Unknown Source)
at net.sourceforge.docfetcher.util.gui.dialog.StackTraceWindow.open(StackTraceWindow.java:75)
at net.sourceforge.docfetcher.util.AppUtil$4.run(AppUtil.java:536)
at net.sourceforge.docfetcher.util.Util.runSwtSafe(Util.java:1343)
at net.sourceforge.docfetcher.util.AppUtil.showStackTrace(AppUtil.java:517)
at net.sourceforge.docfetcher.util.AppUtil.showStackTrace(AppUtil.java:473)
at net.sourceforge.docfetcher.gui.Application.handleCrash(Application.java:369)
at net.sourceforge.docfetcher.gui.Application.main(Application.java:337)
... 5 more