dsound: Declare some variables static.

dlls/dsound/dsound_main.c

@@ -95,10 +95,10 @@ int ds_snd_queue_max = 10;
 int ds_snd_queue_min = 6;
 int ds_snd_shadow_maxsize = 2;
 int ds_hw_accel = DS_HW_ACCEL_FULL;
-int ds_default_playback = 0;
-int ds_default_capture = 0;
 int ds_default_sample_rate = 44100;
 int ds_default_bits_per_sample = 16;
+static int ds_default_playback;
+static int ds_default_capture;
 
 /*
  * Get a config key from either the app-specific or the default config

dlls/dsound/dsound_private.h

@@ -37,8 +37,6 @@ extern int ds_snd_queue_max;
 extern int ds_snd_queue_min;
 extern int ds_snd_shadow_maxsize;
 extern int ds_hw_accel;
-extern int ds_default_playback;
-extern int ds_default_capture;
 extern int ds_default_sample_rate;
 extern int ds_default_bits_per_sample;