Failed to evaluate glue component {filetype}

In the internal function `get_stadiamap_tile`, one of the conditionals in charge of returning a message when you have an invalid URL (i.e. an URL with no response), leads to an error because an object needed to assemble the message has not been defined: the `filetype` object.

https://github.com/dkahle/ggmap/blob/8b12bebcc95b6ed2fe211580a88f0b47922baf4b/R/get_stadiamap.R#L332C86-L332C94

Start in R/get_stadiamap.R at line 332, inside get_stadiamap_tile, and exercise the invalid-URL/no-response branch. Trace the message assembly and verify that the branch completes without the undefined filetype error and reports the invalid URL condition.

Written by the indexing model from the issue text.