Slight tidy-up of the code.
Slight tidy-up of the code.

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