Reset window value

Resets a window value from the attack grid to the one originally initialized in.

Syntax
reset_window_value( attack, window, index );

Returns
N/A

Basic
// resets the vspeed of the second window to the value in fspecial_air.gml: reset_window_value( AT_FSPECIAL_AIR, 2, AG_WINDOW_VSPEED );