parser: fixup remove struct from the audit bool conversion

This removes the struct wrapper used in the previous patch to ensure
that all uses are properly converted.

Signed-off-by: John Johansen <john.johansen@canonical.com>

parser/mqueue.h

@@ -88,7 +88,7 @@ public:
 	char *qname;
 	char *label;
 	perms_t perms;
-	struct { bool audit; } audit;
+	bool audit;
 	int deny;
 
 	mqueue_rule(perms_t perms, struct cond_entry *conds, char *qname = NULL);