utils: Use bitwise & rather than % mod to determine odd/even
utils: Use bitwise & rather than % mod to determine odd/even

In do_pagination() change the test for an odd or even row number to use
the bitwise & operator rather than the % mod operator.

& should be faster than %, not that it likely matters much in this case.
But using & to simply check the least significant bit (1 if it's an odd
number, 0 if it's even) seems like a neater way of doing it.

Signed-off-by: Andrew Clayton <02e0a999c50b1f88df7a8f5a04e1b76b35ea6a88@digital-domain.net>

ac000/fcgi_app_core,ac000/fcgi_app_core