修复去设置页面后背景变不回来（之前没修好）

Zframework/bg.lua

@@ -26,12 +26,12 @@ end
 function BG.set(background)
 	if background==BG.cur or not SETTING.bg then return end
 	BG.discard()
+	BG.cur=background
 	background=BGlist[background]
 	if not background then
 		LOG.print("No BG called"..background,"warn")
 		return
 	end
-	BG.cur=background
 
 	BG.init=	background.init or NULL
 	BG.resize=	background.resize or NULL

main.lua

@@ -100,6 +100,8 @@ GAME={
 	rec={},				--Recording list, key,time,key,time...
 	rank=nil,			--Rank reached
 
+	prevBG=nil,			--Previous background, for restore BG when quit setting page
+
 	--Data for royale mode
 	stage=nil,			--Game stage
 	mostBadge=nil,		--Most badge owner

parts/scenes/pause.lua

@@ -111,6 +111,10 @@ function sceneInit.pause(org)
 			S.trophyColor=COLOR.lCyan
 		end
 	end
+	if GAME.bg then
+		BG.set(GAME.BG)
+		GAME.prevBG=nil
+	end
 end
 function sceneBack.pause()
 	love.keyboard.setKeyRepeat(true)
@@ -126,6 +130,8 @@ function keyDown.pause(key)
 	elseif key=="escape"then
 		resumeGame()
 	elseif key=="s"then
+		GAME.prevBG=BG.cur
+		print(BG.cur)
 		SCN.go("setting_sound")
 	elseif key=="r"then
 		resetGameData()