compile bug

sched.c: In function `timer_func':
sched.c:95: warning: implicit declaration of function `timer_set'
sched.c: At top level:
sched.c:100: error: conflicting types for 'timer_set'
sched.c:95: error: previous implicit declaration of 'timer_set' was here
make[2]: *** [libopenpbx_la-sched.lo] Error 1
make[2]: Leaving directory `/usr/src/openpbx-jb_timer_conference-2/corelib'
make[1]: *** [all] Error 2
make[1]: Leaving directory `/usr/src/openpbx-jb_timer_conference-2/corelib'
make: *** [all-recursive] Error 1