Changed smbmsg_t.expiration from a time_t to a ulong (whoops).

src/smblib/smbdefs.h

@@ -535,7 +535,7 @@ typedef struct {				// Message
 	dfield_t	*dfield;		// Data fields (fixed length portion)
 	ulong		offset; 		// Offset (number of records) into index
 	int			forwarded;		// Forwarded from agent to another
-	time_t		expiration; 	// Message will expire on this day (if >0)
+	ulong		expiration; 	// Message will expire on this day (if >0)
 	ulong		priority;		// Message priority (0 is lowest)
 	ulong		cost;			// Cost to download/read