fix build warnings in 'libglusterfsclient'
fix build warnings in 'libglusterfsclient'

Signed-off-by: Anand V. Avati <avati@dev.gluster.com>

BUG: 130 (build warnings)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=130

Kaushikbv/Gluster,Kaushikbv/Gluster,Kaushikbv/Gluster