V4L/DVB (3568f): saa7110: Fix array overrun

Fix a (probably harmless) array overrun in the DECODER_DUMP command of the
saa7110 driver.  No big deal as this command is not used anywhere anyway. 
Also reformat the dump so that it displays nicely.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>