Fix Zerg structure regression mid-mutation

patchnotes.md

@@ -7,6 +7,9 @@ Note that the editor mpq has recently had its name changed. Adjust your SCMDraft
 
 Aside from that: More audiovisuals (thanks DarkenedFantasies and Solstice!), and more balance changes are coming your way!
 
+## Bugfixes
+- Mutated Zerg structures no longer fail to regress properly when killed mid-mutation (c. Veeq7)
+
 ## Audiovisuals
 - Improved sprite:
 	- Bunker: attack overlay is partially-transparent and casts light on the structure (c. DarkenedFantasies)