Move assignments for things only needed in the loop inside the loop

src/conio/bitmap_con.c

@@ -402,6 +402,7 @@ static void	cb_drawrect(struct rectlist *data)
 	 * 5) When blinking, the cursor is shown when vstat.blink is true.
 	 */
 	assert_rwlock_rdlock(&vstatlock);
+	if (cursor_visible_locked()) {
 		if (vstat.mode == PRESTEL_40X24)
 			cv = 0x80FFFFFF;
 		else
@@ -412,7 +413,6 @@ static void	cb_drawrect(struct rectlist *data)
 		curs_col = vstat.curs_col;
 		charheight = vstat.charheight;
 		charwidth = vstat.charwidth;
-	if (cursor_visible_locked()) {
 		assert_rwlock_unlock(&vstatlock);
 		for (y = curs_start; y <= curs_end; y++) {
 			pixel = &data->data[((curs_row - 1) * charheight + y) * data->rect.width + (curs_col - 1) * charwidth];