part of issue65 didn't make it through the merge
part of issue65 didn't make it through the merge

fix for crash when truncating a line and the truncated part is shorter
then the truncation token.

SinnerSchraderMobileMirrors/TTTAttributedLabel,JIFFinc/TTTAttributedLabel,jianwoo/TTTAttributedLabel,HackRoy/TTTAttributedLabel,TTTAttributedLabel/TTTAttributedLabel,xudongdong/TTTAttributedLabel,buiminhhuy/TTTAttributedLabel,zilanfeng/TTTAttributedLabel,hoaquo/TTTAttributedLabel,bilawal-liaqat/TTTAttributedLabel,yimouleng/TTTAttributedLabel,wintersweet/TTTAttributedLabel,0xced/TTTAttributedLabel,sugarmo/TTTAttributedLabel,SampleLiao/TTTAttributedLabel,CoderIvanLee/TTTAttributedLabel,WWLJ/TTTAttributedLabel,engmahsa/TTTAttributedLabel,qskycolor/TTTAttributedLabel,gga122/TTTAttributedLabel,mattt/TTTAttributedLabel,Nykho/TTTAttributedLabel,z8927623/TTTAttributedLabel,yaoxiaoyong/TTTAttributedLabel,mjhassan/TTTAttributedLabel,FiftyThree/TTTAttributedLabel,sunzeboy/TTTAttributedLabel,FishMemory/TTTAttributedLabel,xuzhiming/TTTAttributedLabel,devandroid/TTTAttributedLabel,zhouwude/TTTAttributedLabel,NewAmsterdamLabs/TTTAttributedLabel,rtsbtx/TTTAttributedLabel,ben181231/TTTAttributedLabel,hao-hua/TTTAttributedLabel,XZwalk/TTTAttributedLabel,Xummer/TTTAttributedLabel,lookingstars/TTTAttributedLabel,denivip/TTTAttributedLabel,leftw1222/TTTAttributedLabel,yanyuqingshi/TTTAttributedLabel,Akylas/TTTAttributedLabel,BarakRL/TTTAttributedLabel,Naithar/TTTAttributedLabel,Voxer/TTTAttributedLabel,zhwcoder/TTTAttributedLabel,KILLI/TTTAttributedLabel,TimorCan/TTTAttributedLabel