Fixed compiler warnings reported on Ubuntu 10.04

Fixed compiler warnings reported on Ubuntu 10.04

The warnings reported where:
--------------------------------------------------------
misc.c:158: warning: ignoring return value of ‘nice’, declared with attribute warn_unused_result
options.c:4033: warning: format not a string literal and no format arguments
options.c:4043: warning: format not a string literal and no format arguments
options.c:4053: warning: format not a string literal and no format arguments
push.c:182: warning: format not a string literal and no format arguments
push.c:199: warning: format not a string literal and no format arguments
push.c:235: warning: format not a string literal and no format arguments
status.c:171: warning: ignoring return value of ‘ftruncate’, declared with attribute warn_unused_result
--------------------------------------------------------

Signed-off-by: David Sommerseth <dazo@users.sourceforge.net>
Acked-by: Gert Doering <gert@greenie.muc.de>
Acked-by: Peter Stuge <peter@stuge.se>