Implement abs(), fixing printf.
Implement abs(), fixing printf.

ComputerNerd/libfxcg-copyleft,ComputerNerd/libfxcg-copyleft,ComputerNerd/libfxcg-copyleft,Jonimoose/libfxcg,Jonimoose/libfxcg,ComputerNerd/libfxcg-copyleft,Forty-Bot/libfxcg,Forty-Bot/libfxcg,Jonimoose/libfxcg,Forty-Bot/libfxcg,Forty-Bot/libfxcg