Merge pull request #8288 from mwerezak/topicfix

Topic Fixes

code/game/machinery/atmoalter/canister.dm

@@ -302,6 +302,7 @@ update_flag
 /obj/machinery/portable_atmospherics/canister/Topic(href, href_list)
 
 	//Do not use "if(..()) return" here, canisters will stop working in unpowered areas like space or on the derelict. // yeah but without SOME sort of Topic check any dick can mess with them via exploits as he pleases -walter0o
+	//First comment might be outdated.
 	if (!istype(src.loc, /turf))
 		return 0
 

code/game/machinery/computer/lockdown.dm

@@ -110,7 +110,7 @@
 		onclose(user, "lockdown")
 
 	Topic(href, href_list)
-		..()
+		if(..()) return 1
 
 		if( href_list["close"] )
 			usr << browse(null, "window=lockdown")

code/game/machinery/computer/medical.dm

@@ -148,7 +148,7 @@
 
 /obj/machinery/computer/med_data/Topic(href, href_list)
 	if(..())
-		return
+		return 1
 
 	if (!( data_core.general.Find(src.active1) ))
 		src.active1 = null

code/game/machinery/computer/pod.dm

@@ -158,7 +158,7 @@
 
 /obj/machinery/computer/pod/Topic(href, href_list)
 	if(..())
-		return
+		return 1
 	if((usr.contents.Find(src) || (in_range(src, usr) && istype(loc, /turf))) || (istype(usr, /mob/living/silicon)))
 		usr.set_machine(src)
 		if(href_list["power"])