Audio: Best settings on all platforms.

After numerous tests, I have found the perfect audio settings. It seems samples now needs to be 2048 for everyone. Buffer needs to be 8192. Anything else gets a patchy noise. None of these platforms were using the right audio settings. Qt and SDL now sound perfect but Blackberry still doesn't (OpenAL thing?).

base/PCMain.cpp

@@ -523,7 +523,7 @@ int main(int argc, char *argv[]) {
 	fmt.freq = 44100;
 	fmt.format = AUDIO_S16;
 	fmt.channels = 2;
-	fmt.samples = 1024;
+	fmt.samples = 2048;
 	fmt.callback = &mixaudio;
 	fmt.userdata = (void *)0;