Created Issue: [0.3.x] typedVar.getAddress returns non properly extended address [13860]

Test:
```
def testGetAddress(self):
tv = target.module.typedVar( "structTest", 0x80000000 )
self.assertEqual( 0xFFFFFFFF80000000, tv.getAddress() )
self.assertEqual( 0xFFFFFFFF80000000, tv )
```

Test is failed