metronomefb: Fix warning when building 64bit

The metronome driver produces warnings when built on x86-64 as it assumes that
size_t is an int. Use %Zd instead.
Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/video/metronomefb.c

@@ -188,7 +188,7 @@ static int __devinit load_waveform(u8 *mem, size_t size, int m, int t,
 		epd_frame_table[par->dt].wfm_size = user_wfm_size;
 
 	if (size != epd_frame_table[par->dt].wfm_size) {
-		dev_err(dev, "Error: unexpected size %d != %d\n", size,
+		dev_err(dev, "Error: unexpected size %Zd != %d\n", size,
 					epd_frame_table[par->dt].wfm_size);
 		return -EINVAL;
 	}