fix many warnings (#889)

* fix many warnings

some of them can be solved by using a prototype-based system
maybe I can try to use some of these systems to reform backgrounds...

* Update app_mahjong.lua

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Co-authored-by: MrZ_26 <1046101471@qq.com>

parts/player/player.lua

@@ -2779,7 +2779,7 @@ function Player:revive()
     self.b2b=0
 
     for i=1,h do
-        self:createClearingFX(i,1.5)
+        self:createClearingFX(i)
     end
     SYSFX.newShade(1.4,self.fieldX,self.fieldY,300*self.size,610*self.size)
     SYSFX.newRectRipple(2,self.fieldX,self.fieldY,300*self.size,610*self.size)