surpress gcc warnings on FreeBSD

surpress gcc warnings on FreeBSD
cc1: warnings being treated as errors
processes.c: In function 'ps_read':
processes.c:343: warning: 'pse.io_rchar' is used uninitialized in this function
processes.c:1436: note: 'pse.io_rchar' was declared here
processes.c:344: warning: 'pse.io_wchar' is used uninitialized in this function
processes.c:1436: note: 'pse.io_wchar' was declared here
processes.c:345: warning: 'pse.io_syscr' is used uninitialized in this function
processes.c:1436: note: 'pse.io_syscr' was declared here
processes.c:346: warning: 'pse.io_syscw' is used uninitialized in this function
processes.c:1436: note: 'pse.io_syscw' was declared here