Cut canvas on the 3rd(and the next) full screen switching

[D0NM]

The init:

GLOBAL_SETTING = {
    FULL_SCREEN = false,
    WINDOW_WIDTH = 640,
    WINDOW_HEIGHT = 480
}

    push:setupScreen(GLOBAL_SETTING.WINDOW_WIDTH, GLOBAL_SETTING.WINDOW_HEIGHT,
	GLOBAL_SETTING.WINDOW_WIDTH, GLOBAL_SETTING.WINDOW_HEIGHT,
        {fullscreen = GLOBAL_SETTING.FULL_SCREEN, resizable = false})

Usage:
push:switchFullscreen()
I get cut canvas after switching modes Window -> FullScreen -> Window -> FullScreen
It looks like some values get broken.

My workaround:

	--this workaround makes PUSH lib switch full screen/window w/o problems
	--passing the constant screen resolution every time
    push:switchFullscreen(GLOBAL_SETTING.WINDOW_WIDTH,GLOBAL_SETTING.WINDOW_HEIGHT)

I use "push" in our open source game project Zabuyaki
https://github.com/thomasgoldstein/zabuyaki
It is easy to check. Use F11 to switch Windowed/FullScreen modes.
controls: X key - Ok, C key - Cancel, Arrow keys

[Ulydev]

fixed in 476290d