Silences warnings of:
charset.c: In function ‘IdentityRecode’:
charset.c:42:51: warning: unused parameter ‘self’ [-Wunused-parameter]
charset.c: In function ‘NullReverse’:
charset.c:84:26: warning: unused parameter ‘n’ [-Wunused-parameter]
charset.c:84:59: warning: unused parameter ‘self’ [-Wunused-parameter]
other.c: In function ‘mapping_utf8’:
other.c:108:44: warning: unused parameter ‘s’ [-Wunused-parameter]
other.c: In function ‘reverse_utf8’:
other.c:114:44: warning: unused parameter ‘s’ [-Wunused-parameter]
luit.c: In function ‘sigwinchHandler’:
luit.c:463:21: warning: unused parameter ‘sig’ [-Wunused-parameter]
luit.c: In function ‘sigchldHandler’:
luit.c:470:20: warning: unused parameter ‘sig’ [-Wunused-parameter]
luit.c: In function ‘parent’:
luit.c:657:12: warning: unused parameter ‘pid’ [-Wunused-parameter]

Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>