gtkmonitor.c:156:79: warning: iteration 9 invokes undefined behavior [-Waggressive-loop-optimizations]
   sprintf(str,"%-2d  SL: %-2d  F1: %s",i,cfg.val_level[i],ltoaf(cfg.val_flags1[i],flags));
                                                                 ~~~~~~~~~~~~~~^~~
gtkmonitor.c:151:2: note: within this loop
  for(i=1; i<=10; i++) {
  ^~~