Fix fwrite return value bug reported by Matthias Kilian <kili@outback.escape.de>.
Fix fwrite return value bug reported by Matthias Kilian <kili@outback.escape.de>.

joel-porquet/tsar-uclibc,joel-porquet/tsar-uclibc,joel-porquet/tsar-uclibc,joel-porquet/tsar-uclibc