- Update snd_alsa with icculus.org's latest.

- Add Brendan Burns to THANKS for the alsa driver.

THANKS

@@ -9,6 +9,7 @@ problems, suggesting various improvements or submitting actual code.  Here is
 a list of these people, alphabetically by surname.  Help me keep it complete
 and exempt of errors.
 
+Brendan Burns			<brendanburns@attbi.com>
 Vincent S. Cojot		<coyote@step.polymtl.ca>
 Bill Currie			<taniwha@quakeforge.net>
 'davoid'			<davoid@softhome.net>

src/snd_alsa.c

@@ -146,6 +146,9 @@ qboolean SNDDMA_Init (void)
     return 0;
   }
   
+  buffer=malloc(snd_buf);
+  memset(buffer, 0, snd_buf);
+
   dma.samplepos = 0;
   dma.submission_chunk = 1;
   dma.buffer = buffer;