Frame buffer can be too small if frame pitch is larger than expected.

[JSensebe]

Using the Genesis Plus GX core, the pitch can be much larger than the width in pixels times the pixel format width. This leads to an error in ArrayVideoDriver.refresh():

Exception ignored on calling ctypes callback function: <bound method CompositeEnvironmentDriver.video_refresh of <libretro.drivers.environment.composite.CompositeEnvironmentDriver object at 0x000001B5E102DC10>>
Traceback (most recent call last):
  File "C:\Users\jsens\AppData\Roaming\Python\Python312\site-packages\libretro\drivers\environment\composite.py", line 332, in video_refresh
    self._video.refresh(view, width, height, pitch)
  File "C:\Users\jsens\AppData\Roaming\Python\Python312\site-packages\libretro\drivers\video\multi.py", line 89, in refresh
    self._current.refresh(data, width, height, pitch)
  File "C:\Users\jsens\AppData\Roaming\Python\Python312\site-packages\libretro\drivers\video\software\array.py", line 33, in refresh
    frameview[: len(data)] = data
    ~~~~~~~~~^^^^^^^^^^^^^
ValueError: memoryview assignment: lvalue and rvalue have different structures

Reallocating the buffer when it is too small rectifies the issue.