[crossfire] Circular lighting & negetive glow_radiuses

[Alex Schultz]

Alex Schultz wrote:

>
     
      I'll make these fixes to my patch at post here when I update it on the 
     
     >
     
      SF tracker.
     
     
Adjustments made and the updated diff is posted on the SF tracker.  I 
fixed the one "//" comment I accidentally left behind, made the 
prescribed changes in monster.c, and changed the >0 and <0 stuff in 
object.c to !=0 and !=NULL to make it clearer. I removed the additive 
behavior from living.c to prevent abuse but left it in map.c and 
spell_attack.c as per my notes in my previous reply.

       --Alex Schultz (aka Rednaxela)