Problem opening map file - leading magic byte is missed

[bekuno]

Describe your problem!

Logfiles shows the following error:

04-14 20:44:09.257 30688 30769 E cgeo    : [RxCachedThreadScheduler-1] Problem opening map file 'content://com.android.externalstorage.documents/tree/6363-3661%3AAndroid%2Fmaps%2Fvector/document/6363-3661%3AAndroid%2Fmaps%2Fvector%2FFreizeitkarte_ita%2Bnorth.map.zip.map'
04-14 20:44:09.257 30688 30769 E cgeo    : org.mapsforge.map.reader.header.MapFileException: reading magic byte has failed
04-14 20:44:09.257 30688 30769 E cgeo    : 	at org.mapsforge.map.reader.MapFile.<init>(MapFile.java:293)
04-14 20:44:09.257 30688 30769 E cgeo    : 	at cgeo.geocaching.maps.mapsforge.MapsforgeMapProvider.createMapFile(MapsforgeMapProvider.java:346)
04-14 20:44:09.257 30688 30769 E cgeo    : 	at cgeo.geocaching.maps.mapsforge.MapsforgeMapProvider.readAttributionFromMapFileIfValid(MapsforgeMapProvider.java:316)
04-14 20:44:09.257 30688 30769 E cgeo    : 	at cgeo.geocaching.maps.mapsforge.MapsforgeMapProvider.getAttributionIfValidFor(MapsforgeMapProvider.java:298)

The download/copy was not successful. You see it on the name Freizeitkarte_ita_north.map.zip.map (doubled map).
The file size is 0 byte, so of cause no magic byte could not read.

How to reproduce?

Don´t know, when the process was interupted.
You can easy create a 0Byte file with name ending .map for testing.

Actual result after these steps?

The file is skipped, but only after trying to read them.

Expected result after these steps?

If the file size is null, the file should be skipped or better deleted, if possible.

Reproducible

Yes

c:geo Version

Nigthly from master

System information

No response

Additional Information

No response