- Optimized a bit the map set cell imperative so it only fails when the target cells are of native type wall/ground, so that it still allows setting/unsetting temporarily unwalkable types by using icewall types of cell.
- Optimized a bit the map set cell imperative so it only fails when the target cells are of native type wall/ground, so that it still allows setting/unsetting temporarily unwalkable types by using icewall types of cell.


git-svn-id: c1e39603916b71782cde5facdf0b79eff05c1414@11770 54d463be-8e91-2dee-dedb-b68131a5f0ec

Nipol/Siesta,Nipol/Siesta,Nipol/Siesta