Fixes #458

Alters the EMP code so that mechas are actually affected by the exosuit
computer commands.
Anything that isn't a Gygax or a Durand will be instantly scuttled, with
the two surviving mechas losing 70-99% of their cell capacity.
Additionally, a small (1 tile) empulse is emitted from the position of
the mecha, disabling headsets and the like.

code/modules/power/smes.dm

@@ -37,7 +37,7 @@
 	spawn(5)
 		if(!powernet)
 			connect_to_network()
-		
+
 		dir_loop:
 			for(var/d in cardinal)
 				var/turf/T = get_step(src, d)
@@ -347,7 +347,7 @@
 			if(prob(50))
 				emp_act(1)
 			else
-				emp_act(2)
+				emp_act(0.5)
 		if(prob(5)) //smoke only
 			var/datum/effect/effect/system/smoke_spread/smoke = new /datum/effect/effect/system/smoke_spread()
 			smoke.set_up(3, 0, src.loc)