vfs_Lookup tries to create bogus directories

[Philip Taylor]

When I run the game on Linux (with no non-standard directories, and with a read-only root), g_VFS->Mount(L"screenshots/", paths.Data()/L"screenshots/") ends up calling vfs_Lookup which calls wmkdir("screenshots") which fails because that's relative to the cwd (the system directory) and read-only.

The ~/.local/share/0ad/screenshots/ directory is created before this happens, and it tries creating the bogus screenshots directory even if that proper one exists.

[Jan Wassenberg]

(In [7378]) fix: mustn't create directories during mount's vfs path traversal (because they may not be associated with a directory, especially in the common case of mounting into the root directory) fixes #459

[(none)]

Milestone OS Pre-Alpha 1 deleted