CHANGE(client): Change ITD to 0.43 ms

A Wikipedia article claims the average distance between ears is 15.2 cm
for men (0.44 ms) and 14.4 cm for women (0.42 ms), which seems
reasonable.

src/mumble/Audio.h

@@ -18,7 +18,7 @@
 #define SAMPLE_RATE 48000
 
 // interaural delay (in samples) for a sound coming directly from the side of the head
-constexpr float INTERAURAL_DELAY = 0.0006 / (1 / static_cast< float >(SAMPLE_RATE));
+constexpr float INTERAURAL_DELAY = 0.00043 / (1 / static_cast< float >(SAMPLE_RATE));
 
 typedef QPair< QString, QVariant > audioDevice;