src/options.c: GCC 4.8.x fix up

Signed-off-by: Paul Reioux <reioux@gmail.com>
src/themes.c: GCC 4.8.x fix up

Signed-off-by: Paul Reioux <reioux@gmail.com>
Merge pull request #53 from faux123/master

GCC 4.8.x compilation warning fixup for latest ubuntu LTS 14.04