Fixed xcode warning
Fixed xcode warning

rauf/gpac,rbouqueau/gpac_brew_travis,aymanelyaagoubi/gpac,nguyen-viet-thanh-trung/gpac,gpac/gpac,ARSekkat/gpac,porcelijn/gpac,RodolpheFouquet/gpac,rauf/gpac,aymanelyaagoubi/gpac,rauf/gpac,emmanouil/gpac,rauf/gpac,emmanouil/gpac,ARSekkat/gpac,rauf/gpac,emmanouil/gpac,aymanelyaagoubi/gpac,rbouqueau/gpac,ARSekkat/gpac,RodolpheFouquet/gpac,rauf/gpac,emmanouil/gpac,gpac/gpac,rbouqueau/gpac_brew_travis,rbouqueau/gpac,rbouqueau/gpac_brew_travis,rbouqueau/gpac_brew_travis,gpac/gpac,RodolpheFouquet/gpac,rbouqueau/gpac,aymanelyaagoubi/gpac,RodolpheFouquet/gpac,nguyen-viet-thanh-trung/gpac,gpac/gpac,rbouqueau/gpac_brew_travis,ARSekkat/gpac,nguyen-viet-thanh-trung/gpac,gpac/gpac,rbouqueau/gpac_brew_travis,nguyen-viet-thanh-trung/gpac,rbouqueau/gpac,porcelijn/gpac,gpac/gpac,rbouqueau/gpac,aymanelyaagoubi/gpac,rbouqueau/gpac,rbouqueau/gpac,ARSekkat/gpac,aymanelyaagoubi/gpac,nguyen-viet-thanh-trung/gpac,gpac/gpac,gpac/gpac,RodolpheFouquet/gpac,rbouqueau/gpac,porcelijn/gpac,RodolpheFouquet/gpac,porcelijn/gpac,emmanouil/gpac,emmanouil/gpac,nguyen-viet-thanh-trung/gpac,porcelijn/gpac,ARSekkat/gpac,porcelijn/gpac