This commit provides a more robust fix for the RuntimeWarning
(invalid value encountered in divide/cast) that could occur in
the `apply_mouth_area` function within
`modules/processors/frame/face_swapper.py`.
The previous check for `feathered_mask.max() == 0` was not
sufficient for all floating point edge cases.
The updated logic now:
- Checks if `feathered_mask.max()` is less than a small epsilon (1e-6).
- If true, it logs a warning and explicitly sets `feathered_mask`
to an all-zero `uint8` array of the correct shape.
- Otherwise, it proceeds with the normalization and casting to `uint8`.
This ensures that division by zero or by extremely small numbers is
prevented, and the `feathered_mask` is always in a valid state for
subsequent blending operations.
5db23597e9