优化几个unpack调用

Zframework/scene.lua

@@ -137,7 +137,8 @@ function SCN.swapTo(tar,style)--Parallel scene swapping, cannot back
 			SCN.swapping=true
 			local S=SCN.stat
 			S.tar,S.style=tar,style
-			S.time,S.mid,S.draw=unpack(swap[style])
+			local s=swap[style]
+			S.time,S.mid,S.draw=s[1],s[2],s[3]
 		end
 	else
 		LOG.print("No Scene: "..tar,"warn")

Zframework/widget.lua

@@ -141,7 +141,8 @@ end
 function button:draw()
 	local x,y,w,h=self.x,self.y,self.w,self.h
 	local ATV=self.ATV
-	local r,g,b=unpack(self.color)
+	local c=self.color
+	local r,g,b=c[1],c[2],c[3]
 	gc.setColor(.2+r*.8,.2+g*.8,.2+b*.8,.7)
 	gc.rectangle("fill",x-ATV,y-ATV,w+2*ATV,h+2*ATV)
 	if ATV>0 then
@@ -233,7 +234,8 @@ end
 function key:draw()
 	local x,y,w,h=self.x,self.y,self.w,self.h
 	local ATV=self.ATV
-	local r,g,b=unpack(self.color)
+	local c=self.color
+	local r,g,b=c[1],c[2],c[3]
 
 	gc.setColor(1,1,1,ATV*.125)
 	gc.rectangle("fill",x,y,w,h)