[MIRROR] Quick pAI software buying tweak (#2825)

* Added the thing that Cruix wanted

* Quick pAI software buying tweak

* Update software.dm

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

@@ -127,11 +127,11 @@
 		if("buy")
 			if(subscreen == 1)
 				var/target = href_list["buy"]
-				if(available_software.Find(target))
+				if(available_software.Find(target) && !software.Find(target))
 					var/cost = src.available_software[target]
 					if(ram >= cost)
-						ram -= cost
 						software.Add(target)
+						ram -= cost
 					else
 						temp = "Insufficient RAM available."
 				else
@@ -248,6 +248,7 @@
 				medHUD = !medHUD
 				if(medHUD)
 					add_med_hud()
+					
 				else
 					var/datum/atom_hud/med = GLOB.huds[med_hud]
 					med.remove_hud_from(src)