main() not returning int.

Description

main() not returning int.
On platforms that need it, Allegro uses END_OF_MAIN to mangle your main() function and supply its own that is required by the platform. Allegro assumes that main() returns an integer, as required by various C standards. If you change the return type of your main() to something else Allegro's main() will get confused and return some nonsense value which some system can recognize as an error and crash your program.