Фикс рантайма медсканнера

[Waselon]

Фикс рантайма при использовании медсканнера на робота.

RUNTIME: runtime error: Cannot read null.reagents
 - proc name: ui static data (/obj/item/healthanalyzer/ui_static_data)
 -   source file: code/game/objects/items/scanners.dm,197
 -   usr: Pepa (/mob/living/carbon/human/species/synthetic)
 -   src: the HF2 Medical Gloves (/obj/item/healthanalyzer/gloves)
 -   usr.loc: the cave (136,72,2) (/turf/open/floor/plating/ground/mars/random/cave)
 -   src.loc: Pepa (/mob/living/carbon/human/species/synthetic)
 -   call stack:
 - the HF2 Medical Gloves (/obj/item/healthanalyzer/gloves): ui static data(Pepa (/mob/living/carbon/human/species/synthetic))
 - /datum/tgui (/datum/tgui): get payload(null, 1, 1)
 - /datum/tgui (/datum/tgui): open()
 - the HF2 Medical Gloves (/obj/item/healthanalyzer/gloves): ui interact(Pepa (/mob/living/carbon/human/species/synthetic), /datum/tgui (/datum/tgui))
 - the HF2 Medical Gloves (/obj/item/healthanalyzer/gloves): analyze vitals(Toaster (/mob/living/carbon/human/species/robot), Pepa (/mob/living/carbon/human/species/synthetic), null)
 - the HF2 Medical Gloves (/obj/item/healthanalyzer/gloves): on unarmed attack(Pepa (/mob/living/carbon/human/species/synthetic), Toaster (/mob/living/carbon/human/species/robot))
 - Pepa (/mob/living/carbon/human/species/synthetic):  SendSignal("human_melee_unarmed_attack", /list (/list))
 - Pepa (/mob/living/carbon/human/species/synthetic): UnarmedAttack(Toaster (/mob/living/carbon/human/species/robot), 1, /list (/list))
 - Pepa (/mob/living/carbon/human/species/synthetic): ClickOn(Toaster (/mob/living/carbon/human/species/robot), the cave (137,72,2) (/turf/open/floor/plating/ground/mars/random/cave), "icon-x=12;icon-y=16;vis-x=17;v...")
 - Toaster (/mob/living/carbon/human/species/robot): Click(the cave (137,72,2) (/turf/open/floor/plating/ground/mars/random/cave), "mapwindow.map", "icon-x=12;icon-y=16;vis-x=17;v...")