r5r *not* throwing error for really large areas

[rafapereirabr]

As mentioned in our FAQ, R5 does not process ares where the bbox of the OSM data exceeds the limit of 975000 km2. The expected behavior of {r5r} is to throw and error in these cases. Something lige:

Geographic extent of street layer (5315196 km2) exceeds limit of 975000 km2”

Nonetheless, {r5r} is not throwing this error. Instead, it prints a message saying that the network.dat file has been built, but the file is not written to disk. This has been reported now in different issues, including #389 #405 #406