Merge pull request #10157 from Ghommie/Ghommie-cit452

Ports "Fixes powernet avail checks"

code/modules/power/apc.dm

@@ -1113,9 +1113,9 @@
 	if(terminal && terminal.powernet)
 		terminal.add_load(amount)
 
-/obj/machinery/power/apc/avail()
+/obj/machinery/power/apc/avail(amount)
 	if(terminal)
-		return terminal.avail()
+		return terminal.avail(amount)
 	else
 		return 0
 

code/modules/power/cable.dm

@@ -217,9 +217,9 @@ By design, d1 is the smallest direction and d2 is the highest
 	else
 		return 0
 
-/obj/structure/cable/proc/avail()
+/obj/structure/cable/proc/avail(amount)
 	if(powernet)
-		return powernet.avail
+		return amount ? powernet.avail >= amount : powernet.avail
 	else
 		return 0
 

code/modules/power/power.dm

@@ -46,9 +46,9 @@
 	else
 		return 0
 
-/obj/machinery/power/proc/avail()
+/obj/machinery/power/proc/avail(amount)
 	if(powernet)
-		return powernet.avail
+		return amount ? powernet.avail >= amount : powernet.avail
 	else
 		return 0