DFDeleteFile: Fix use of incorrect error code
DFDeleteFile: Fix use of incorrect error code

If the call to stat in DFDeleteFile failed, we would incorrectly pass
statbuf.st_mode to DFSetError, which made no sense at all. What we
*really* want to pass in is errno.

apache/incubator-corinthia,apache/incubator-corinthia,corinthia/corinthia-docformats,apache/incubator-corinthia,apache/incubator-corinthia,apache/incubator-corinthia,corinthia/corinthia-docformats,corinthia/corinthia-docformats,apache/incubator-corinthia,apache/incubator-corinthia,corinthia/corinthia-docformats,corinthia/corinthia-docformats