nvda

cb5405f1 - Python 3: Check for None during check for previous installation version in Installer GUI (PR #9924)

Python 3: Check for None during check for previous installation version in Installer GUI (PR #9924) Comparison function found in installer can return an integer (-1, 0, 1) or None. Because of this, when comparing the return value from installer GUI, it assumed None was an integer when in fact in Python 3, it is a different type. Fixes #9923