coverity: ftell returns a signed value
coverity: ftell returns a signed value

The check for flen < 0 could never have been true since flen was declared
to be size_t (unsigned). Declare flen to be long since that is what ftell
returns.

Signed-off-by: Dwight Engen <1793d65cf7b9eefb2bb8f5bee9a4b8ba782c26da@oracle.com>
Signed-off-by: Serge Hallyn <3df611b026e4639bee8aef7a4beb2e39fcebb313@ubuntu.com>

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