src:ticket:643

git-svn-id: https://www.myroms.org/svn/src/trunk@737 f091316a-d328-0410-a40a-876eff57d070
Make t0mk and s0mk local to ice_mk.h.

Conflicts:
	ROMS/SeaIce/ice_frazil.F
Adding wsalt, modifying ice_mk.h
Need idWsalt
Fixes from Zafar and the forum.
Put T0mk, S0mk back.
Put back t0mk, s0mk.