BUF_OVERLAY_MODIFF  601 src/buffer.c     BUF_OVERLAY_MODIFF (b) = 1;
BUF_OVERLAY_MODIFF 3605 src/buffer.c     modiff_incr (&BUF_OVERLAY_MODIFF (buf), 1);
BUF_OVERLAY_MODIFF  961 src/buffer.h   	  == BUF_OVERLAY_MODIFF (buf)))
BUF_OVERLAY_MODIFF  232 src/window.c   	  || w->last_overlay_modified < BUF_OVERLAY_MODIFF (b));
BUF_OVERLAY_MODIFF 17441 src/xdisp.c      w->last_overlay_modified = accurate_p ? BUF_OVERLAY_MODIFF (b) : 0;
BUF_OVERLAY_MODIFF 17455 src/xdisp.c          BUF_OVERLAY_UNCHANGED_MODIFIED (b) = BUF_OVERLAY_MODIFF (b);