## What are the changes about?
buf_height is declared at the start of the draw() function of the
Matrix animation but both buf_height and self.terminal_buffer.height are
used in the function. replace every occurence of
self.terminal_buffer.height by buf_height for consistency.
The same goes for buf_width and self.terminal_buffer.width.
no functionnal changes
## What existing issue does this resolve?
N/A
## Pre-requisites
- [x] I have tested & confirmed the changes work locally
Reviewed-on: https://codeberg.org/fairyglade/ly/pulls/903
Reviewed-by: AnErrupTion <anerruption@disroot.org>
Co-authored-by: Theo Gaige <theo.gaige@free.fr>
Co-committed-by: Theo Gaige <theo.gaige@free.fr>
