Fixed indexOf usages that causes RTE
Fixed indexOf usages that causes RTE

musikame/SoundJS,SpringRoll/SoundJS,Teino1978-Corp/Teino1978-Corp-SoundJS,andrew168/SoundJS,legendvijay/SoundJS,tehvgg/SoundJS,andrew168/SoundJS,kidaa/SoundJS,CreateJS/SoundJS,ebabel-eu/SoundJS,SpringRoll/SoundJS,konistehrad/SoundJS,legendvijay/SoundJS,tehvgg/SoundJS,not-only-code/SoundJS,baiyanghese/SoundJS,ebabel-eu/SoundJS,Teino1978-Corp/Teino1978-Corp-SoundJS,CreateJS/SoundJS,musikame/SoundJS,not-only-code/SoundJS,konistehrad/SoundJS,kidaa/SoundJS,createjs-components/soundjs