Update transfusion.sqf

24 Dec 2014 (Veltro): Addapted code to work for blood bags and whole blood bags. Removed the use of uninitialized variable '_bbselect'. Rearranged arrays to optimize blood bag selection. No longer treat someone that has an unknown blood type as type O-. Small optimization to humanity points that are awarded (mainly less points in case of treating a healthy person). Improved program flow for better readability.