fix function signature in catcpadapter.c

fix function signature in catcpadapter.c

The uint32_t and size_t type were mixed up in this file, this could
make the compiler generate code which would prepare the stack in a
different way the function expects it to be prepared and this will
cause some strange runtime problems.

Change-Id: I7665ce9e1bacc25bc367f2d64ff1775253db0454
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Reviewed-on: https://gerrit.iotivity.org/gerrit/3451
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Patrick Lankswert <patrick.lankswert@intel.com>