Add missing SQUASH_END_DECLS in mtx-internal.h
Add missing SQUASH_END_DECLS in mtx-internal.h

quixdb/squash,Cloudef/squash,quixdb/squash,quixdb/squash,jibsen/squash,jibsen/squash,jibsen/squash,Cloudef/squash,Cloudef/squash