Fix memory alignment and remove dead/useless code.

Fix memory alignment and remove dead/useless code.

 * those write to stderr were legacy from development, some of them
   were even wrongly accessing out-of-buffer memory;

 * some platforms cannot access non-aligned memory, like integers that
   are not aligned to sizeof(int) and do on. Change the generated
   message using memcpy to aligned memory before using them. Add
   comment to explain that;

git-svn-id: svn+ssh://svn.enlightenment.org/var/svn/e/trunk/ethumb@50135 7cbeb6ba-43b4-40fd-8cce-4c39aea84d33