Revert "write iso files only is their names are non-empty"
Revert "write iso files only is their names are non-empty"

This reverts commit 8114b98c43a41fec7916fd31450d7a8c0cc4ff6f.

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