Fix some problems about invert and tear effects in effects.rpy

[JimenezLi]

Fix two problems:

The size of effect tear and invert didn't match the window size

Basically, a tear effect looks like this before modifying. It doesn't match the window.

I change the screenshot_srf function, and now the screenshot size is right.

Remove hide_windows_enabled function

This function causes the game to raise an exception, when trying to save after a tear screen. For example, after running the following code, trying to save will crash the game. Full Bug Report

show screen tear(20, 0.1, 0.1, 0, 40)
play sound "sfx/s_kill_glitch1.ogg"
$ pause(0.75)
stop sound
hide screen tear

Besides, the Original Script Files already use window hide(None) to hide window, so this function is not necessary.

[Bronya-Rand]

I wouldn't really know anyone who would save in the midst of a tear screen to be honest, however, I am still willing to apply the PR as-is after some verifying, though I will see to when I have time to test the PR sometime in this week.

[Elckarow]

I wouldn't really know anyone who would save in the midst of a tear screen

the problem is that the tear effect is saved even after it's hidden, to allow rollback

[Bronya-Rand]

Merging for now as it seems to work.

[Elckarow]

gotta love it when your pr reviews are completely ignored