staging: panel: Remove magic numbers
staging: panel: Remove magic numbers

Get rid of magic numbers indicating that the value of a module param
is not set. Use a defined value instead.

Signed-off-by: Mariusz Gorski <4f4aee4ad08b480a29cb1573dc81654ab1351700@gmail.com>
Acked-by: Willy Tarreau <aff024fe4ab0fece4091de044c58c9ae4233383a@1wt.eu>
Signed-off-by: Greg Kroah-Hartman <4645f7897fd33786a2ee1264d590b3c400559d85@linuxfoundation.org>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs