Fix a bug in loading davobject

[zealseeker]

To solve the issue #505

1. Removed vcal.fix as it has been implemented in _set_data
2. Return load_by_multiget() when GET fails.

[tobixen]

You stil need to set self.data=r.raw.

And also, does this work for you? I ran the test code towards all the servers I had access to without hitting this problem, so I can't test this myself. (What calendar server do you use?)

[zealseeker]

@tobixen OK. I've added it. Since 'r' may not be assigned when an excpetion is catched, I add it in the try block. Please check whether it is fine.

I am using Lark (named Feishu in China) and have the same problem as #459

[tobixen]

Right. I was testing towards Lark at some point - but that was after my last change.

I think this looks good.

[tobixen]

Some comments:

• With the return-statement now, code after the try-except-block should only run if there are no exceptions, so r will always be set.
• The next lines also depends on r

Hence it doesn't really matter if self.data = r.raw is inside or outside the try-block.