Fixes #3319, you cannot use rpd's when they are far away from you.

Fixes machine frames (but the real way that should have been done originally)
Fixes #2701, r-ust topics should no longer be affected by ghost hands

code/WorkInProgress/Cael_Aislinn/Rust/core_control.dm

@@ -122,7 +122,7 @@
 	user.set_machine(src)
 
 /obj/machinery/computer/rust_core_control/Topic(href, href_list)
-	..()
+	if(..()) return
 
 	if( href_list["goto_scanlist"] )
 		cur_viewed_device = null

code/WorkInProgress/Cael_Aislinn/Rust/core_gen.dm

@@ -180,6 +180,7 @@ max volume of plasma storeable by the field = the total volume of a number of ti
 	user.set_machine(src)
 
 /obj/machinery/power/rust_core/Topic(href, href_list)
+	if(..()) return
 	if(href_list["str"])
 		var/dif = text2num(href_list["str"])
 		field_strength = min(max(field_strength + dif, MIN_FIELD_STR), MAX_FIELD_STR)

code/WorkInProgress/Cael_Aislinn/Rust/fuel_compressor.dm

@@ -68,7 +68,7 @@ var/const/max_assembly_amount = 300
 	//var/coverlocked
 
 /obj/machinery/rust_fuel_compressor/Topic(href, href_list)
-	..()
+	if(..()) return
 	if( href_list["close"] )
 		usr << browse(null, "window=fuelcomp")
 		usr.machine = null

code/WorkInProgress/Cael_Aislinn/Rust/fuel_control.dm

@@ -130,7 +130,7 @@
 	user.set_machine(src)
 
 /obj/machinery/computer/rust_fuel_control/Topic(href, href_list)
-	..()
+	if(..()) return
 
 	if( href_list["scan"] )
 		connected_injectors = list()

code/WorkInProgress/Cael_Aislinn/Rust/fuel_injector.dm

@@ -137,7 +137,7 @@
 	user.set_machine(src)
 
 /obj/machinery/power/rust_fuel_injector/Topic(href, href_list)
-	..()
+	if(..()) return
 
 	if( href_list["modify_tag"] )
 		id_tag = input("Enter new ID tag", "Modifying ID tag") as text|null

code/WorkInProgress/Cael_Aislinn/Rust/gyrotron.dm

@@ -28,7 +28,7 @@
 		//pixel_y = (dir & 3)? (dir ==1 ? -24 : 24) : 0
 
 	Topic(href, href_list)
-		..()
+		if(..()) return
 		if( href_list["close"] )
 			usr << browse(null, "window=gyro_monitor")
 			usr.machine = null