- Handle empty or non-existing files in FileReader::readFile() for unix hosts.
- Handle empty or non-existing files in FileReader::readFile() for unix hosts.

git-svn-id: 04e88ac4940b0408b73cd6f458a224a262abaaff@106 ec705bc8-faf6-4f9b-9aff-b4916e9bedc3

jbuchbinder/rawspeed,jbuchbinder/rawspeed