update_use_power() now doesn't force updates...

...if it doesnt need to.

code/game/machinery/machinery.dm

@@ -159,6 +159,9 @@ Class Procs:
 
 //sets the use_power var and then forces an area power update
 /obj/machinery/proc/update_use_power(var/new_use_power)
+	if (new_use_power == use_power)
+		return	//don't need to do anything
+	
 	use_power = new_use_power
 	use_power(0) //force area power update
 

code/game/machinery/rechargestation.dm

@@ -61,7 +61,10 @@
 						R.module.respawn_consumable(R)
 					if(!R.cell)
 						return
+					if(!R.cell.fully_charged())
 						R.cell.give(active_power_usage*CELLRATE)
+					else
+						update_use_power(1)
 		go_out()
 			if(!( src.occupant ))
 				return
@@ -73,8 +76,7 @@
 			src.occupant.loc = src.loc
 			src.occupant = null
 			build_icon()
-			src.use_power = 1
+			update_use_power(1)
-			use_power(0)	//update area power usage
 			return
 
 
@@ -114,6 +116,5 @@
 				O.loc = src.loc*/
 			src.add_fingerprint(usr)
 			build_icon()
-			src.use_power = 2
+			update_use_power(2)
-			use_power(0)	//update area power usage
 			return