allow to close formspec when offering things to the npc via player_offers_item

fs_player_offers_item.lua

@@ -28,6 +28,18 @@ yl_speak_up.input_player_offers_item = function(player, formname, fields)
 	end
 	local pname = player:get_player_name()
 	local trade_inv = minetest.get_inventory({type="detached", name="yl_speak_up_player_"..pname})
+	if(fields.quit) then
+		-- return the items
+		local player_inv = player:get_inventory()
+		local stack = trade_inv:get_stack("npc_wants", 1)
+		if( trade_inv and player_inv:room_for_item("main", stack)) then
+			player_inv:add_item("main", stack)
+			trade_inv:set_stack("npc_wants", 1, "")
+		end
+		-- sometimes players are desperate and just want to leave - allow them to do so
+		yl_speak_up.stop_talking(pname)
+		return
+	end
 	local error_msg = "Please insert the item for the npc and click on \"Give\"!\n"..
 			  "If you don't want to give anything, click on \"Back to talk\".]"
 	-- is the npc_wants inv empty and the player pressed the back to talk button?

fs_talkdialog.lua

@@ -1,6 +1,9 @@
 -- This is the main talkdialog the NPC shows when right-clicked.
 
 yl_speak_up.stop_talking = function(pname)
+	if(not(pname)) then
+		return
+	end
 	yl_speak_up.edit_mode[pname] = nil
 	yl_speak_up.speak_to[pname] = nil
 	minetest.close_formspec(pname, "yl_speak_up:talk")