Fixed markdown semantic wikilinks callback
Fixed markdown semantic wikilinks callback

The last version of the markdown plugin defines an extra parameter which
is the current markdown instance. See:

- <http://git.constantvzw.org/?p=aa.mdx_semanticwikilinks.git;a=tree> or
- <https://github.com/aleray/mdx_semanticwikilinks/commit/f3bfe05e232a9bff0e3dccf0f8b8c6fb598ec9ba>

codingisacopingstrategy/aa-wiki,codingisacopingstrategy/aa-wiki,codingisacopingstrategy/aa-wiki,codingisacopingstrategy/aa-wiki,codingisacopingstrategy/aa-wiki