accept empty xml space for content:encoded

[JLugagne]

in some cases, the space is empty to use the tag namespace as default. To manage this I have added an OR conditions in rss/parser.go.

Alternative: improve goxpp to use tag namespace as xmlns default if empty ?

[mmcdole]

@JLugagne Can you show a quick example of this? I think I understand, but want to be completely sure.

It sounds like this might be better to be fixed in goxpp, but I'd like to make sure I grok what the issue is.

[JLugagne]

Sure, one of the RSS feed I had to use was having xmlns:content in the root tag but in the content:enconded tag it was defining only the xmlns attribute (you can check the unit test I have added). In that case I guess that it means xmlns refer to the namespace of the tag?

[mmcdole]

This should be fixed with #223, so closing. Thank you @JLugagne !