Break 1 level less, otherwise the rest of the messages are not processed.

Break 1 level less, otherwise the rest of the messages are not processed.

I hit this bug by coincidance and thnx to a server crash. Cyrus returned
information like UID, RFC822.SIZE, INTERNALDATE (that info is probably
cached by cyrus) correct, but an empty header. At the end of the response
there was an untagged OK response with as server message: Message <nnn> no
longer exists.

git-svn-id: https://svn.code.sf.net/p/squirrelmail/code/trunk/squirrelmail@6901 7612ce4b-ef26-0410-bec9-ea0150e637f0