Merge pull request #8794 from Birdtalon/fixes

Fixes and tweaks

code/modules/mob/living/silicon/silicon.dm

@@ -224,10 +224,11 @@
 /mob/living/silicon/proc/remove_med_sec_hud()
 	var/datum/atom_hud/secsensor = huds[sec_hud]
 	var/datum/atom_hud/medsensor = huds[med_hud]
-	var/datum/atom_hud/diagsensor = huds[d_hud]
+	for(var/datum/atom_hud/data/diagnostic/diagsensor in huds)
+		diagsensor.remove_hud_from(src)
 	secsensor.remove_hud_from(src)
 	medsensor.remove_hud_from(src)
-	diagsensor.remove_hud_from(src)
+
 
 /mob/living/silicon/proc/add_sec_hud()
 	var/datum/atom_hud/secsensor = huds[sec_hud]

code/modules/reagents/chemistry/reagents/medicine.dm

@@ -1042,6 +1042,7 @@
 	description = "Highly advanced nanites equipped with calcium payloads designed to repair bones. Nanomachines son."
 	color = "#9b3401"
 	metabolization_rate = 0.5
+	can_synth = FALSE
 
 /datum/reagent/medicine/nanocalcium/on_mob_life(mob/living/carbon/human/M)
 	switch(current_cycle)