Alberyk dev fixes (#571)

Fixing some wrong path in robotic modules and missing right ear slot contained sprites.

code/modules/clothing/spacesuits/rig/modules/utility.dm

@@ -270,6 +270,8 @@
 	usable = 0
 	selectable = 1
 	disruptive = 1
+	construction_cost = list(DEFAULT_WALL_MATERIAL=10000,"glass"=9250,"gold"=2500,"silver"=4250,"phoron"=5500)
+	construction_time = 400
 
 	interface_name = "mounted chem injector"
 	interface_desc = "Dispenses loaded chemicals via an arm-mounted injector."

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

@@ -605,6 +605,8 @@ var/global/list/damage_icon_parts = list()
 			else if(r_ear.sprite_sheets && r_ear.sprite_sheets[species.get_bodytype()])
 				t_type = "[t_type]_r"
 				overlays_standing[EARS_LAYER] = image("icon" = r_ear.sprite_sheets[species.get_bodytype()], "icon_state" = "[t_type]")
+			else if(r_ear.contained_sprite)
+				overlays_standing[EARS_LAYER] = image("icon" = r_ear.icon, "icon_state" = "[r_ear.icon_state]_w")
 			else
 				overlays_standing[EARS_LAYER] = image("icon" = 'icons/mob/ears.dmi', "icon_state" = "[t_type]")
 

code/modules/research/designs.dm

@@ -1752,7 +1752,7 @@ datum/design/item/rigmodule/chem_module
 	id = "chem_module"
 	req_tech = list("biotech" = 5, "materials" = 4, "programming" = 3)
 	materials = list("$glass" = 9250, "$metal" = 10000, "$gold" = 2500, "$silver" = 4250, "$phoron" = 5500)
-	build_path = /obj/item/rig_module/chem_dispenser
+	build_path = /obj/item/rig_module/chem_dispenser/injector
 
 datum/design/item/rigmodule/plasmacutter_module
 	desc = "Allows for the construction of a hardsuit-mounted plasma cutter."