Screenshots of endgame text are cut off

[GooberRF]

To reproduce:

1. Trigger endgame (easiest way is to load l7s1 and shoot gryphon)
2. Take screenshot while endgame text is scrolling
3. Look at screenshot, bottom is cut off

I tested when running the game at both 1920x1080 and 1024x768:

• With game at 1920x1080, screenshots taken during endgame are 1920x810
• With game at 1024x768, screenshots taken during endgame are 1024x576

This seems like it could possibly be related to #103 , but I'm not certain. (note that the screenshot in that issue was not taken with the game's screenshot function)

[GooberRF]

Screenshots of both tests to illustrate issue: