vim: Vim: Denial of Service via stack out-of-bounds write in spell_soundfold_sofo()

A memory corruption flaw in Vim allows an attacker to cause a Denial of Service DoS. When a SOFO-based spell language is active, providing an excessively long word to the spell checker triggers a stack out-of-bounds write in the spellsoundfoldsofo function, causing the editor to crash...