Fix error for read only files in version check
Fix error for read only files in version check

The access fails for:

index.php?action=admin;area=maintain;sa=routine;activity=version

when the forum does not have write access to the source folders.

(cherry picked from commit a27a67fa53f575cf7a3a632a377ba271869088cd)

Spuds/Elkarte,interlab/Elkarte,emanuele45/Dialogo,emanuele45/Dialogo,elkarte/Elkarte,StealthWombat/How-to-fork-an-Elk,interlab/Elkarte,elkarte/Elkarte,interlab/Elkarte,emanuele45/Dialogo,Spuds/Elkarte,StealthWombat/How-to-fork-an-Elk,Spuds/Elkarte,elkarte/Elkarte,StealthWombat/How-to-fork-an-Elk,StealthWombat/How-to-fork-an-Elk