[media] fix a warning on avr32 arch

X-Patchwork-Delegate: m.chehab@samsung.com
on avr32 arch, those warnings happen:
	drivers/media/firewire/firedtv-fw.c: In function 'node_update':
	drivers/media/firewire/firedtv-fw.c:329: warning: comparison is always true due to limited range of data type

In this particular case, the signal is desired, as the isochannel
var can be initalized with -1 inside the driver.

So, change the type to s8, to avoid issues on archs where char
is unsigned.

Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Reviewed-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/media/firewire/firedtv.h b/drivers/media/firewire/firedtv.h
index c2ba085e0d20..346a85be6de2 100644
--- a/drivers/media/firewire/firedtv.h
+++ b/drivers/media/firewire/firedtv.h
@@ -96,7 +96,7 @@ struct firedtv {
 
         enum model_type         type;
         char                    subunit;
-        char                    isochannel;
+        s8                      isochannel;
         struct fdtv_ir_context  *ir_context;
 
         fe_sec_voltage_t        voltage;