eina: fix wrong EINA_ARG_NONNULL

eina: fix wrong EINA_ARG_NONNULL

This fixes the following error:

CC     libeina_la-eina_error.lo
CC     libeina_la-eina_log.lo
In file included from ../../src/include/eina_safety_checks.h:69,
from eina_error.c:150:
../../src/include/eina_error.h:53: error: nonnull argument references non-pointer operand (argument 1, operand 1)
make[3]: *** [libeina_la-eina_error.lo] Error 1
make[3]: *** Waiting for unfinished jobs....
In file included from ../../src/include/eina_safety_checks.h:69,
from eina_log.c:287:
../../src/include/eina_error.h:53: error: nonnull argument references non-pointer operand (argument 1, operand 1)
make[3]: *** [libeina_la-eina_log.lo] Error 1
make[3]: Leaving directory `/data/projects/qi-bootmenu-system/build/temp-armv4tl/eina/src/lib'
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory `/data/projects/qi-bootmenu-system/build/temp-armv4tl/eina/src'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/data/projects/qi-bootmenu-system/build/temp-armv4tl/eina'
make: *** [all] Error 2

Patch by: Marc Andre Tanner <mat@brain-dump.org>

git-svn-id: svn+ssh://svn.enlightenment.org/var/svn/e/trunk/eina@52947 7cbeb6ba-43b4-40fd-8cce-4c39aea84d33