choose a different quaternion, one with non zero scalar part. Windows unit tests give different (but valid in double mapping) answer in this situation

Author: petercorke

tests/test_quaternion.py

@@ -525,7 +525,7 @@ def test_interp(self):
         rz = UnitQuaternion.Rz(pi / 2)
         u = UnitQuaternion()
 
-        q = rx * ry * rz
+        q = UnitQuaternion.RPY([.2, .3, .4])
 
         # from null
         qcompare(q.interp1(0), u)