cleanup fullscreen apply delay workaround
cleanup fullscreen apply delay workaround

fixed in SDL 2.0.4
https://forums.libsdl.org/viewtopic.php?t=10688

ProfessorKaos64/openlierox,ProfessorKaos64/openlierox,ProfessorKaos64/openlierox,ProfessorKaos64/openlierox,ProfessorKaos64/openlierox,ProfessorKaos64/openlierox,ProfessorKaos64/openlierox