fixed the runtime warning.
Merge pull request #21 from qiujiejun/master

fixed the runtime warning.
improve the font size of slide item in status bar.
Merge branch 'master' of github.com:onyx-intl/booxsdk
Merge pull request #22 from weihua/master

improve the font size of slide item in status bar.
Merge branch 'master' into glow_light