Fixes runtimes with rigs

Naked and trying to wear a rig, it will attempt to access w_uniform.inv_flags which will be null and runtime.

Moves shoe redrawing to uniform and suit update_inv code in update_icons, rather than in inventory.dm. update_icons already had code for this.

code/modules/mob/living/carbon/human/inventory.dm

@@ -267,8 +267,6 @@ This saves us from having to call add_fingerprint() any time something is put in
 			update_inv_shoes(redraw_mob)
 		if(slot_wear_suit)
 			src.wear_suit = W
-			if((wear_suit.flags_inv & HIDESHOES) || (w_uniform.flags_inv & HIDESHOES))
-				update_inv_shoes(0)
 			W.equipped(src, slot)
 			update_inv_wear_suit(redraw_mob)
 		if(slot_w_uniform)

code/modules/mob/living/carbon/human/update_icons.dm

@@ -499,6 +499,9 @@ var/global/list/damage_icon_parts = list()
 	else
 		overlays_standing[UNIFORM_LAYER]	= null
 
+	//hiding/revealing shoes if necessary
+	update_inv_shoes(0)
+
 	if(update_icons)
 		update_icons()
 
@@ -774,10 +777,12 @@ var/global/list/damage_icon_parts = list()
 	else
 		overlays_standing[SUIT_LAYER]	= null
 		update_tail_showing(0)
-		update_inv_shoes(0)
 
 	update_collar(0)
 
+	//hide/show shoes if necessary
+	update_inv_shoes(0)
+
 	if(update_icons)   update_icons()
 
 /mob/living/carbon/human/update_inv_pockets(var/update_icons=1)