Fix linux build
Fix linux build

On gcc:
template<> void function(Type) generates a different symbol to void
function(Type), so we probably should keep consistently using template<>
as we pre-declare that at the beginning of the file.

pmprog/OpenApoc,ShadowDancer/OpenApoc,FranciscoDA/OpenApoc,pmprog/OpenApoc,FranciscoDA/OpenApoc,Istrebitel/OpenApoc,steveschnepp/OpenApoc,steveschnepp/OpenApoc,FranciscoDA/OpenApoc,ShadowDancer/OpenApoc,Istrebitel/OpenApoc