[PATCH] Allow query of file owners to work with non-existing files
Previously, attempting to query the owner of a file owned by some
package but absent from the filesystem would fail. This could lead to
a small annoyance - if a user or misbehaving software accidentally
deleted a file owned by some package, and the user wishes to know
which package it belonged to so that it can be restored, pacman would
refuse to provide this information if the file no longer exists.
Thus, allow file owner query to continue if the file does not exist.
Print a warning in this situation and continue lookup using the exact