mod: bug fix in reading TOC
mod: bug fix in reading TOC

change misplaced carriage ret characters (0x0d) in toc entry
to white space (0x20) to avoid displaying empty boxes.

Hzj-jie/koreader-base,NiLuJe/koreader-base,apletnev/koreader-base,frankyifei/koreader-base,noname007/koreader,NiLuJe/koreader-base,Frenzie/koreader-base,Frenzie/koreader,koreader/koreader-base,lgeek/koreader,Hzj-jie/koreader-base,robert00s/koreader,frankyifei/koreader-base,koreader/koreader-base,ashang/koreader,apletnev/koreader,NiLuJe/koreader,poire-z/koreader,koreader/koreader-base,frankyifei/koreader,Frenzie/koreader-base,poire-z/koreader,houqp/koreader-base,Frenzie/koreader-base,houqp/koreader-base,Hzj-jie/koreader-base,Hzj-jie/koreader,koreader/koreader,chrox/koreader,koreader/koreader,chihyang/koreader,NiLuJe/koreader-base,apletnev/koreader-base,apletnev/koreader-base,NiLuJe/koreader,houqp/koreader-base,Frenzie/koreader,Hzj-jie/koreader-base,NickSavage/koreader,pazos/koreader,NiLuJe/koreader-base,koreader/koreader-base,Markismus/koreader,mihailim/koreader,mwoz123/koreader,houqp/koreader,frankyifei/koreader-base,ashhher3/koreader,apletnev/koreader-base,frankyifei/koreader-base,houqp/koreader-base,Frenzie/koreader-base