fix compile error. https://github.com/0x0c/LMMediaPlayer/issues/17
fix compile error.
https://github.com/0x0c/LMMediaPlayer/issues/17

sdgandhi/LMMediaPlayer,fly2012/LMMediaPlayer,zsk425/LMMediaPlayer,Michael-Z/LMMediaPlayer,dlpigpen/LMMediaPlayer,freeme/LMMediaPlayer,Niko-r/LMMediaPlayer,ichu501/LMMediaPlayer,0x0c/LMMediaPlayer,Shumais/LMMediaPlayer,Roeun/LMMediaPlayer,flypigrmvb/LMMediaPlayer