GHSA-RFGQ-Q3W2-PMV2 Pillow: Image.quantize() with empty palette leaks uninitialized stack memory

============================================================================ Image.quantize with empty palette leaks uninitialized stack memory Location: src/libImaging/Palette.c:216 in ImagingPaletteCacheUpdate Commit: a707c6b21c313880d0771e54965d142dd42358b6...