fixes components not gc'ing; minor tweaks to QDEL_HINT_FINDREFERENCE

code/ATMOSPHERICS/components/unary_devices/vent_pump.dm

@@ -2,6 +2,9 @@
 #define INT_BOUND	2
 #define NO_BOUND	3
 
+#define SIPHONING	0
+#define RELEASING	1
+
 /obj/machinery/atmospherics/components/unary/vent_pump
 	icon_state = "vent_map"
 
@@ -19,12 +22,12 @@
 	var/id_tag = null
 
 	var/on = 0
-	var/pump_direction = 1 //0 = siphoning, 1 = releasing
+	var/pump_direction = RELEASING
 
 	var/external_pressure_bound = ONE_ATMOSPHERE
 	var/internal_pressure_bound = 0
 
-	var/pressure_checks = 1
+	var/pressure_checks = EXT_BOUND
 	//EXT_BOUND: Do not pass external_pressure_bound
 	//INT_BOUND: Do not pass internal_pressure_bound
 	//NO_BOUND: Do not pass either
@@ -40,7 +43,7 @@
 	icon_state = "vent_out"
 
 /obj/machinery/atmospherics/components/unary/vent_pump/siphon
-	pump_direction = 0
+	pump_direction = SIPHONING
 
 /obj/machinery/atmospherics/components/unary/vent_pump/siphon/on
 	on = 1
@@ -88,9 +91,9 @@
 		icon_state = "vent_off"
 		return
 
-	if(pump_direction)
+	if(pump_direction & RELEASING)
 		icon_state = "vent_out"
-	else
+	if(pump_direction & SIPHONING)
 		icon_state = "vent_in"
 
 /obj/machinery/atmospherics/components/unary/vent_pump/process_atmos()
@@ -110,7 +113,7 @@
 	var/datum/gas_mixture/environment = loc.return_air()
 	var/environment_pressure = environment.return_pressure()
 
-	if(pump_direction) //internal -> external
+	if(pump_direction & RELEASING) //internal -> external
 		var/pressure_delta = 10000
 
 		if(pressure_checks&EXT_BOUND)
@@ -127,7 +130,7 @@
 				loc.assume_air(removed)
 				air_update_turf()
 
-	else //external -> internal
+	if(pump_direction & SIPHONING) //external -> internal
 		var/pressure_delta = 10000
 		if(pressure_checks&EXT_BOUND)
 			pressure_delta = min(pressure_delta, (environment_pressure - external_pressure_bound))
@@ -206,11 +209,11 @@
 
 	if("purge" in signal.data)
 		pressure_checks &= ~EXT_BOUND
-		pump_direction = 0
+		pump_direction = SIPHONING
 
 	if("stabalize" in signal.data)
 		pressure_checks |= EXT_BOUND
-		pump_direction = 1
+		pump_direction = RELEASING
 
 	if("power" in signal.data)
 		on = text2num(signal.data["power"])
@@ -315,3 +318,10 @@
 
 /obj/machinery/atmospherics/components/unary/vent_pump/can_crawl_through()
 	return !welded
+
+#undef INT_BOUND
+#undef EXT_BOUND
+#undef NO_BOUND
+
+#undef SIPHONING
+#undef RELEASING

code/ATMOSPHERICS/components/unary_devices/vent_scrubber.dm

@@ -1,3 +1,6 @@
+#define SIPHONING	0
+#define SCRUBBING	1
+
 /obj/machinery/atmospherics/components/unary/vent_scrubber
 	icon_state = "scrub_map"
 
@@ -22,7 +25,7 @@
 	var/list/turf/simulated/adjacent_turfs = list()
 
 	var/on = 0
-	var/scrubbing = 1 //0 = siphoning, 1 = scrubbing
+	var/scrubbing = SCRUBBING //0 = siphoning, 1 = scrubbing
 	var/scrub_CO2 = 1
 	var/scrub_Toxins = 0
 	var/scrub_N2O = 0
@@ -66,14 +69,14 @@
 
 	var/amount = idle_power_usage
 
-	if (scrubbing)
+	if(scrubbing & SCRUBBING)
 		if (scrub_CO2)
 			amount += idle_power_usage
 		if (scrub_Toxins)
 			amount += idle_power_usage
 		if (scrub_N2O)
 			amount += idle_power_usage
-	else
+	if(scrubbing & SIPHONING)
 		amount = active_power_usage
 
 	if (widenet)
@@ -94,9 +97,9 @@
 		icon_state = "scrub_off"
 		return
 
-	if(scrubbing)
+	if(scrubbing & SCRUBBING)
 		icon_state = "scrub_on"
-	else
+	if(scrubbing & SIPHONING)
 		icon_state = "scrub_purge"
 
 /obj/machinery/atmospherics/components/unary/vent_scrubber/proc/set_frequency(new_frequency)
@@ -165,7 +168,7 @@
 	var/datum/gas_mixture/environment = tile.return_air()
 	var/datum/gas_mixture/air_contents = AIR1
 
-	if(scrubbing)
+	if(scrubbing & SCRUBBING)
 		if((environment.toxins>0) || (environment.carbon_dioxide>0) || (environment.trace_gases.len>0))
 			var/transfer_moles = min(1, volume_rate/environment.volume)*environment.total_moles()
 
@@ -200,7 +203,7 @@
 			tile.assume_air(removed)
 			tile.air_update_turf()
 
-	else //Just siphoning all air
+	if(scrubbing & SIPHONING) //Just siphoning all air
 		if (air_contents.return_pressure()>=50*ONE_ATMOSPHERE)
 			return
 
@@ -316,3 +319,6 @@
 
 /obj/machinery/atmospherics/components/unary/vent_scrubber/can_crawl_through()
 	return !welded
+
+#undef SIPHONING
+#undef SCRUBBING