Merge pull request #3831 from ey6es/master

Clear the saccade when Faceshift is active.

interface/src/avatar/Head.cpp

@@ -204,6 +204,8 @@ void Head::simulate(float deltaTime, bool isMine, bool billboard) {
             _mouth3,
             _mouth4,
             _blendshapeCoefficients);
+    } else {
+        _saccade = glm::vec3();
     }
     
     if (!isMine) {