No map if no geodata in post available

Hi there,

I have a travel blog website.
If I do a new post without any geodata information, it still posts a map in my widget with the geodata information of another post.

How can I change this. I want to have a message like “There is no location information in this post…” if there is no geodata information in the post.

My current widget code is now:

[geo_mashup_map height=”250″ width=”250″]

Thank you!