Fixed GCC warnings
Fixed GCC warnings

git-svn-id: ab66a9de07fa9d47c5829c82992f5279466c775f@4732 63c20433-aa62-49bd-875c-5a186b69a8fb

rbouqueau/gpac_brew_travis,emmanouil/gpac,nguyen-viet-thanh-trung/gpac,gpac/gpac,drakeguan/gpac,vladimir-kazakov/gpac,RodolpheFouquet/gpac,ARSekkat/gpac,ARSekkat/gpac,aymanelyaagoubi/gpac,emmanouil/gpac,aymanelyaagoubi/gpac,rauf/gpac,rbouqueau/gpac_brew_travis,canatella/gpac,DmitrySigaev/gpac,vladimir-kazakov/gpac,psteinb/gpac,DmitrySigaev/gpac,ARSekkat/gpac,rauf/gpac,drakeguan/gpac,vladimir-kazakov/gpac,rauf/gpac,RodolpheFouquet/gpac,drakeguan/gpac,canatella/gpac,rbouqueau/gpac,rbouqueau/gpac_brew_travis,gpac/gpac,DmitrySigaev/gpac,porcelijn/gpac,nguyen-viet-thanh-trung/gpac,aymanelyaagoubi/gpac,ARSekkat/gpac,canatella/gpac,vladimir-kazakov/gpac,epam/gpac,porcelijn/gpac,rbouqueau/gpac_brew_travis,Bevara/Access-open,canatella/gpac,RodolpheFouquet/gpac,psteinb/gpac,epam/gpac,emmanouil/gpac,epam/gpac,rauf/gpac,Bevara/Access-open,ARSekkat/gpac,Bevara/Access-open,psteinb/gpac,rbouqueau/gpac,DmitrySigaev/gpac,vladimir-kazakov/gpac,psteinb/gpac,rauf/gpac,gpac/gpac,gpac/gpac,rbouqueau/gpac_brew_travis,RodolpheFouquet/gpac,aymanelyaagoubi/gpac,psteinb/gpac,Bevara/Access-open,epam/gpac,epam/gpac,rbouqueau/gpac,porcelijn/gpac,aymanelyaagoubi/gpac,nguyen-viet-thanh-trung/gpac,vladimir-kazakov/gpac,gpac/gpac,epam/gpac,nguyen-viet-thanh-trung/gpac,porcelijn/gpac,drakeguan/gpac,DmitrySigaev/gpac,Bevara/Access-open,nguyen-viet-thanh-trung/gpac,ARSekkat/gpac,gpac/gpac,drakeguan/gpac,gpac/gpac,Bevara/Access-open,rbouqueau/gpac,rauf/gpac,rbouqueau/gpac,canatella/gpac,emmanouil/gpac,DmitrySigaev/gpac,rbouqueau/gpac,psteinb/gpac,RodolpheFouquet/gpac,porcelijn/gpac,canatella/gpac,drakeguan/gpac,emmanouil/gpac,rbouqueau/gpac,RodolpheFouquet/gpac,rbouqueau/gpac,emmanouil/gpac,nguyen-viet-thanh-trung/gpac,porcelijn/gpac,rbouqueau/gpac_brew_travis,aymanelyaagoubi/gpac,gpac/gpac,canatella/gpac