Fix crash on broken ARJ files
Fix crash on broken ARJ files

siranwu/theunarchiver,ethus3h/theunarchiver,letup/theunarchiver,letup/theunarchiver,letup/theunarchiver,dsp2003/theunarchiver,siranwu/theunarchiver,ethus3h/theunarchiver,ethus3h/theunarchiver,dsp2003/theunarchiver,dsp2003/theunarchiver,siranwu/theunarchiver