pixma: MP490 Series doesn't need special image formatting @ high dpi

backend/pixma_mp150.c

@@ -1212,6 +1212,7 @@ post_process_image_data (pixma_t * s, pixma_imagebuf_t * ib)
            * MP220, MX360 and generation 5 scanners are exceptions */
           if (n > 0
               && s->cfg->pid != MP220_PID
+              && s->cfg->pid != MP490_PID
               && s->cfg->pid != MX360_PID
               && (mp->generation < 5
                   /* generation 5 scanners *with* special image format */