use xor instead of incrementing blink

Because blink is a signed integer, an eventual overflow would result in
undefined behavior.

1 files changed, 1 insertions, 1 deletions

diff --git a/xlib.c b/xlib.c
index d5c078c..a94e8f8 100644
--- a/xlib.c
+++ b/xlib.c
@@ -405,7 +405,7 @@ void uudisp_refresh(struct uudisp *d, struct uuterm *t)
 	int x1, x2, idx, y;
 
 	/* Clean up cursor first.. */
-	if (p->curs_on && (!(d->blink&1) || t->x != p->curs_x || t->y != p->curs_y)) {
+	if (p->curs_on && (!d->blink || t->x != p->curs_x || t->y != p->curs_y)) {
 		idx = t->rows[p->curs_y]->idx;
 		if ((unsigned)p->slices_y[idx] < d->h)
 			blit_slice(d, idx, p->curs_x, p->curs_x);