Revert "Initialize 'sec2' once, its value will never change while running."
Revert "Initialize 'sec2' once, its value will never change while running."

This reverts commit d4e71621ddd354a1f6114e9ae7b64f3d04228f77.

It would cause sec2 to be uninitialized when init is not -1.
Found by: GCC 4.7

rene0/dcf77pi,rene0/dcf77pi