hw/input/pckbd: Use qemu_log_mask(GUEST_ERROR) instead of fprintf

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-id: 20180624040609.17572-2-f4bug@amsat.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
diff --git a/hw/input/pckbd.c b/hw/input/pckbd.c
index f33e3fc..07c8801 100644
--- a/hw/input/pckbd.c
+++ b/hw/input/pckbd.c
@@ -22,6 +22,7 @@
  * THE SOFTWARE.
  */
 #include "qemu/osdep.h"
+#include "qemu/log.h"
 #include "hw/hw.h"
 #include "hw/isa/isa.h"
 #include "hw/i386/pc.h"
@@ -308,7 +309,8 @@
         /* ignore that */
         break;
     default:
-        fprintf(stderr, "qemu: unsupported keyboard cmd=0x%02x\n", (int)val);
+        qemu_log_mask(LOG_GUEST_ERROR,
+                      "unsupported keyboard cmd=0x%02" PRIx64 "\n", val);
         break;
     }
 }