ALSA: hdspm - Fix compile warnings with PPC

The char can be unsigned on some architectures.  Since the code checks
the negative values, they should be declared as signed char explicitly.

  sound/pci/rme9652/hdspm.c:5449: warning: comparison is always false due to limited range of data type
  sound/pci/rme9652/hdspm.c:5462: warning: comparison is always false due to limited range of data type

Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/pci/rme9652/hdspm.c b/sound/pci/rme9652/hdspm.c
index 3f08afc0f0d382b5b509c924abc2eb8532f4c822..c8e402fc378247ac3cf5dcc1cd2838fb40172e85 100644 (file)
--- a/sound/pci/rme9652/hdspm.c
+++ b/sound/pci/rme9652/hdspm.c
@@ -896,11 +896,11 @@ struct hdspm {
        unsigned char max_channels_in;
        unsigned char max_channels_out;
 
-       char *channel_map_in;
-       char *channel_map_out;
+       signed char *channel_map_in;
+       signed char *channel_map_out;
 
-       char *channel_map_in_ss, *channel_map_in_ds, *channel_map_in_qs;
-       char *channel_map_out_ss, *channel_map_out_ds, *channel_map_out_qs;
+       signed char *channel_map_in_ss, *channel_map_in_ds, *channel_map_in_qs;
+       signed char *channel_map_out_ss, *channel_map_out_ds, *channel_map_out_qs;
 
        char **port_names_in;
        char **port_names_out;