Fixes a use-after-free introduced in 3f4f035, where on successful style deduplication the loop would continue, and fail to dereference the style pointer on next iteration, leading to a segfault.

Of note, I can only reproduce this on musl, but the bug was equally present on glibc. AFAICT glibc is a bit more lax with clearing leftovers after using free(), so it went unnoticed.