Merge branch 'treeco/fix-audio-panic' into 'master'

Fix Rodio panic

See merge request veloren/veloren!4420

voxygen/src/audio/mod.rs

@@ -23,7 +23,7 @@ use vek::*;
 
 use crate::hud::Subtitle;
 
-#[derive(Default, Clone)]
+#[derive(Clone)]
 pub struct Listener {
     pub pos: Vec3<f32>,
     pub ori: Vec3<f32>,
@@ -32,6 +32,17 @@ pub struct Listener {
     ear_right_rpos: Vec3<f32>,
 }
 
+impl Default for Listener {
+    fn default() -> Self {
+        Self {
+            pos: Default::default(),
+            ori: Default::default(),
+            ear_left_rpos: Vec3::unit_x(),
+            ear_right_rpos: -Vec3::unit_x(),
+        }
+    }
+}
+
 /// Holds information about the system audio devices and internal channels used
 /// for sfx and music playback. An instance of `AudioFrontend` is used by
 /// Voxygen's [`GlobalState`](../struct.GlobalState.html#structfield.audio) to