Fixes morph movement and replaces magic numbers. (#46358)

* fixes morph speed shizz

* fixes morph movement

code/game/objects/effects/effect_system/effects_foam.dm

@@ -14,7 +14,7 @@
 	layer = EDGED_TURF_LAYER
 	mouse_opacity = MOUSE_OPACITY_TRANSPARENT
 	var/amount = 3
-	animate_movement = 0
+	animate_movement = NO_STEPS
 	var/metal = 0
 	var/lifetime = 40
 	var/reagent_divisor = 7

code/game/objects/objs.dm

@@ -1,6 +1,6 @@
 
 /obj
-	animate_movement = 2
+	animate_movement = SLIDE_STEPS
 	speech_span = SPAN_ROBOT
 	var/obj_flags = CAN_BE_HIT
 	var/set_obj_flags // ONLY FOR MAPPING: Sets flags from a string list, handled in Initialize. Usage: set_obj_flags = "EMAGGED;!CAN_BE_HIT" to set EMAGGED and clear CAN_BE_HIT.

code/modules/antagonists/morph/morph.dm

@@ -115,7 +115,7 @@
 	//Morphed is weaker
 	melee_damage_lower = melee_damage_disguised
 	melee_damage_upper = melee_damage_disguised
-	speed = 0
+	set_varspeed(0)
 
 	morph_time = world.time + MORPH_COOLDOWN
 	med_hud_set_health()
@@ -130,7 +130,7 @@
 	form = null
 	alpha = initial(alpha)
 	color = initial(color)
-	animate_movement = initial(animate_movement)
+	animate_movement = SLIDE_STEPS
 	maptext = null
 
 	visible_message("<span class='warning'>[src] suddenly collapses in on itself, dissolving into a pile of green flesh!</span>", \
@@ -143,7 +143,7 @@
 	//Baseline stats
 	melee_damage_lower = initial(melee_damage_lower)
 	melee_damage_upper = initial(melee_damage_upper)
-	speed = initial(speed)
+	set_varspeed(initial(speed))
 
 	morph_time = world.time + MORPH_COOLDOWN
 	med_hud_set_health()

code/modules/mob/living/simple_animal/bot/mulebot.dm

@@ -14,7 +14,7 @@
 	icon_state = "mulebot0"
 	density = TRUE
 	move_resist = MOVE_FORCE_STRONG
-	animate_movement = 1
+	animate_movement = FORWARD_STEPS
 	health = 50
 	maxHealth = 50
 	damage_coeff = list(BRUTE = 0.5, BURN = 0.7, TOX = 0, CLONE = 0, STAMINA = 0, OXY = 0)

code/modules/mob/mob_defines.dm

@@ -10,7 +10,7 @@
 	datum_flags = DF_USE_TAG
 	density = TRUE
 	layer = MOB_LAYER
-	animate_movement = 2
+	animate_movement = SLIDE_STEPS
 	flags_1 = HEAR_1
 	hud_possible = list(ANTAG_HUD)
 	pressure_resistance = 8

code/modules/projectiles/projectile.dm

@@ -42,7 +42,7 @@
 	var/original_angle = 0		//Angle at firing
 	var/nondirectional_sprite = FALSE //Set TRUE to prevent projectiles from having their sprites rotated based on firing angle
 	var/spread = 0			//amount (in degrees) of projectile spread
-	animate_movement = 0	//Use SLIDE_STEPS in conjunction with legacy
+	animate_movement = NO_STEPS	//Use SLIDE_STEPS in conjunction with legacy
 	var/ricochets = 0
 	var/ricochets_max = 2
 	var/ricochet_chance = 30