Quat freezes when passed a list as an argument

[Josh Enes]

If Quat is given a list as the construction argument it will freeze the program. The correct behaviour should be to generate an error.

For example with Point3:
Point3([1, 2, 3])
Traceback (most recent call last):
  File "test.py", line 3, in <module>
    p = Point3([1, 2, 3])
TypeError: Arguments must match one of:
LPoint3f()
LPoint3f(const LVecBase3f copy)
LPoint3f(float fill_value)
LPoint3f(float x, float y, float z)

But with Quat:
Quat([1, 2, 3, 4])
# program is frozen (infinite loop?)