Make sure the buffer is big enough, if the HEIGHT is not evenly divisible by 8

Author: steka

examples/framebuf_simpletest.py

@@ -1,18 +1,20 @@
 # SPDX-FileCopyrightText: 2021 ladyada for Adafruit Industries
 # SPDX-License-Identifier: MIT
 
+import math
 import adafruit_framebuf
 
 print("framebuf test will draw to the REPL")
 
 WIDTH = 32
 HEIGHT = 8
 
-buffer = bytearray(round(WIDTH * HEIGHT / 8))
+buffer = bytearray(round(WIDTH * math.ceil(HEIGHT / 8)))
 fb = adafruit_framebuf.FrameBuffer(
     buffer, WIDTH, HEIGHT, buf_format=adafruit_framebuf.MVLSB
 )
 
+
 # Ascii printer for very small framebufs!
 def print_buffer(the_fb):
     print("." * (the_fb.width + 2))