Fix compiler warning - unused variable 'para'
Fix compiler warning - unused variable 'para'

synaptics.c: In function 'post_scroll_events':
synaptics.c:2426:26: warning: unused variable 'para' [-Wunused-variable]

Signed-off-by: Peter Hutterer <b9c50af7afa7642f6f854434cda9ffe54ece8b85@who-t.net>

mad-s/xf86-input-synaptics-absolute,mad-s/xf86-input-synaptics-absolute