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Recent gcc/glibc combinations warn about ignoring the fgets() result.
The problem exists on Ubuntu 9.10 with current updates. This "fix" of
the non-problem (as I check ferror() afterwards) should even be a
(negligible) performance optimization.

Corresponding to flashrom svn r884.
Signed-off-by: Michael Karcher <flashrom@mkarcher.dialup.fu-berlin.de>
Acked-by: Andrew Morgan <ziltro@ziltro.com>