pcsound: Fix resouce leak with speaker_handle.

speaker_handle should be close()d after forking the separate sound
server. This fixes #192 (thanks Edward-san).

pcsound/pcsound_bsd.c

@@ -237,6 +237,7 @@ static int StartSoundServer(void)
         // This is the parent
 
         sound_server_pid = result;
+        close(speaker_handle);
     }
 
     return 1;