Merge pull request Aurorastation#6717 from Menshin/ambiguous_expressi…

…on_fix

Fixes being unable to craft 1x multiplier items from stacks

code/game/objects/items/stacks/stack.dm

@@ -81,7 +81,7 @@
 				title+= "[R.title]"
 			title+= " ([R.req_amount] [src.singular_name]\s)"
 			if (can_build)
-				t1 += text("<A href='?src=\ref[src];sublist=[recipes_sublist];make=[i]'>[title]</A>  ")
+				t1 += text("<A href='?src=\ref[src];sublist=[recipes_sublist];make=[i];multiplier=1'>[title]</A>  ")
 			else
 				t1 += text("[]", title)
 				continue
@@ -117,7 +117,7 @@
 			recipes_list = srl.recipes
 		var/datum/stack_recipe/R = recipes_list[text2num(href_list["make"])]
 		var/multiplier = text2num(href_list["multiplier"])
-		if (multiplier <= 0) //href exploit protection
+		if (!multiplier || (multiplier <= 0)) //href exploit protection
 			return
 		if (src.amount < R.req_amount*multiplier)
 			if (R.req_amount*multiplier>1)