Edited Issue: [0.3.x] printing bitfield raises exception [14091]

```
>>> print str(structWithBitField)
struct/class: Test at 0x0
+0000 a : Int4B:4 Invalid memory
>>> print str(structWithBitField.a)
Traceback (most recent call last):
File "<console>", line 1, in <module>
DbgException: File: c:\proj\pykd_dev\kdlibcpp\source\typedvarimp.h Line: 19 Not Implemented

```