stop this nonsense

code/modules/shuttle/shuttle.dm

@@ -76,7 +76,7 @@
 /obj/docking_port/singularity_pull()
 	return
 /obj/docking_port/singularity_act()
-	return 0
+	return FALSE
 /obj/docking_port/shuttleRotate()
 	return //we don't rotate with shuttles via this code.
 
@@ -954,7 +954,7 @@
 /obj/docking_port/mobile/proc/get_engine_coeff(current,engine_mod)
 	var/new_value = max(0,current + engine_mod)
 	if(new_value == initial_engines)
-		return 1
+		return TRUE
 	if(new_value > initial_engines)
 		var/delta = new_value - initial_engines
 		var/change_per_engine = (1 - ENGINE_COEFF_MIN) / ENGINE_DEFAULT_MAXSPEED_ENGINES // 5 by default