testdisplay: fix error output if test pattern draw fails

diff --git a/tests/testdisplay.c b/tests/testdisplay.c
index 18fd214..8859d55 100644 (file)
--- a/tests/testdisplay.c
+++ b/tests/testdisplay.c
@@ -854,7 +854,7 @@ set_mode(struct connector *c)
                status = cairo_status(cr);
                cairo_destroy(cr);
                if (status)
-                       fprintf(stderr, "failed to draw pretty picture %x%d: %s\n",
+                       fprintf(stderr, "failed to draw pretty picture %dx%d: %s\n",
                                width, height, cairo_status_to_string(status));
 
                ret = drmModeAddFB(fd, width, height, depth, bpp,