moved check up under Click()

code/game/gamemodes/changeling/powers/tiny_prick.dm

@@ -80,6 +80,11 @@
 	selected_dna = changeling.select_dna("Select the target DNA: ", "Target DNA")
 	if(!selected_dna)
 		return
+	if(selected_dna)
+		var/datum/species/newspecies = all_species[selected_dna.species]
+		if((newspecies.flags & NOTRANSSTING) || newspecies.is_small)
+			to_chat(user, "<span class='warning'>The selected DNA is incompatible with our sting.</span>")
+			return FALSE
 	..()
 
 /obj/effect/proc_holder/changeling/sting/transformation/can_sting(var/mob/user, var/mob/target)
@@ -88,11 +93,6 @@
 	if((HUSK in target.mutations) || (!ishuman(target)))
 		to_chat(user, "<span class='warning'>Our sting appears ineffective against its DNA.</span>")
 		return FALSE
-	if(selected_dna)
-		var/datum/species/newspecies = all_species[selected_dna.species]
-		if((newspecies.flags & NOTRANSSTING) || newspecies.is_small)
-			to_chat(user, "<span class='warning'>The selected DNA is incompatible with our sting.</span>")
-			return FALSE
 	if(ishuman(target))
 		var/mob/living/carbon/human/H = target
 		if(H.species.flags & NO_DNA)
@@ -121,7 +121,7 @@
 		target.UpdateAppearance()
 		domutcheck(target, null)
 	feedback_add_details("changeling_powers","TS")
-	return 1
+	return TRUE
 
 obj/effect/proc_holder/changeling/sting/extract_dna
 	name = "Extract DNA Sting"