Remove '\e'. The escape sequence is not in ISO C.

Signed-off-by: OGINO Masanori <masanori.ogino@gmail.com>
Cast to `void *` for '%p' format specifiers.

Signed-off-by: OGINO Masanori <masanori.ogino@gmail.com>
Merge pull request #13 from omasanori/isoc-part-1

Improve ISO C Conformance and Remove Warnings: Part 1