Lose some weight, fatty (#16913)

Changed fitness machines and structures to actually help you lose weight other than rapidly draining your nutrition. Machine types have had their weight loss multiplied by 10 so they no longer take 80 or 40 uses to lose 1lb. Structure types previously had no weight loss attached, they now have similar amounts to the machine types.

code/game/objects/structures/fitness.dm

@@ -2,6 +2,7 @@
 	icon = 'icons/obj/stationobjs.dmi'
 	anchored = TRUE
 	var/being_used = 0
+	var/weightloss_power = 1
 
 /obj/structure/fitness/punchingbag
 	name = "punching bag"
@@ -23,6 +24,7 @@
 			playsound(src, 'sound/effects/woodhit.ogg', 25, 1, -1)
 			user.do_attack_animation(src)
 			user.nutrition = user.nutrition - 5
+			user.weight -= 0.25 * weightloss_power * (0.01 * user.weight_loss)
 			to_chat(user, span_warning("You [pick(hit_message)] \the [src]."))
 
 /obj/structure/fitness/weightlifter
@@ -59,6 +61,8 @@
 		if(do_after(user, 20 + (weight * 10)))
 			playsound(src, 'sound/effects/weightdrop.ogg', 25, 1)
 			user.adjust_nutrition(weight * -10)
+			var/weightloss_enhanced = weightloss_power * (weight * 0.5)
+			user.weight -= 0.25 * weightloss_enhanced * (0.01 * user.weight_loss)
 			to_chat(user, span_notice("You lift the weights [qualifiers[weight]]."))
 			being_used = 0
 		else