C4 is only logged when placed on a mob and needs to be logged all the time.

Created by: Probe1

Description of issue

If you place C4 on a welder tank it isn't logged. I had a peek at TG code because jordie just did something new with C4 and saw this

message_admins("[key_name_admin(user)](<A HREF='?_src_=holder;adminmoreinfo=\ref[user]'>?</A>) (<A HREF='?_src_=holder;adminplayerobservefollow=\ref[user]'>FLW</A>) planted [src.name] on [target.name] at ([target.x],[target.y],[target.z] - <A HREF='?_src_=holder;adminplayerobservecoodjump=1;X=[target.x];Y=[target.y];Z=[target.z]'>JMP</a>) with [det_time] second fuse",0,1)
 +      log_game("[key_name(user)] planted [src.name] on [target.name] at ([target.x],[target.y],[target.z]) with [det_time] second fuse")

This is basically what we need. A jmp, coordinates, and a log.