unixCurrentTime being aliased to NULL cause crashes with custom VFS v1 implementation
The GDAL library uses a custom VFS implementation, which, for some operations
not related to the VFS (xRandomness, xSleep, xCurrentTime etc.) basically
forwards the call to the default VFS implementation like:
Up to now, it used iVersion = 1 of the VFS structure, i.e. not implementing
Starting with SQLite 3.10.0, the unixCurrentTime function is now aliased to
the NULL pointer. Which caused the invokation of the xCurrentTime pointer of
the default VFS to dereference a null pointer function in the above code.