Turned all macros to functions. Marked everything as G_GNUC_PRINTF and
* include/glibtop/error.h:
* lib/parameter.c: (glibtop_set_parameter_l):
* lib/read_data.c: (glibtop_read_data_l):
* sysdeps/common/error.c: (print_server_name), (glibtop_error_vr),
(glibtop_error_io_vr), (glibtop_warn_vr), (glibtop_warn_io_vr),
(glibtop_error_r), (glibtop_warn_r), (glibtop_error_io_r),
(glibtop_warn_io_r), (glibtop_error), (glibtop_warn),
(glibtop_error_io), (glibtop_warn_io): Turned all macros to functions.
Marked everything as G_GNUC_PRINTF and fixed format bugs.
* sysdeps/common/fsusage.c: Marked some functions as G_GNUC_INTERNAL