Fix softlock on modern when selecting "Team" from menu

[evanc577]

With modern compiler, the sFriendList variable is placed directly after gUnknown_3000E94 in memory.

sub_80089AC(), which appears to draw the background for windows, does incorrect bounds checking, which can cause it to overflow the gUnknown_3000E94 array. This is problematic for the end of dungeon window, which scrolls up from the bottom of the screen, guaranteeing an overflow. After the overflow, sFriendList is overwritten and upon trying to open the "Team" menu, the game softlocks.

Softlock repro steps:

1. Start game
2. Enter a dungeon
3. Select give up from menu
4. After waking up, open menu and select "Team", game softlocks

[AnonymousRandomPerson]

Very interesting, thanks for investigating!