Added preproc if (MME) for NAS message:

Line 1849
# if defined(ENABLE_USE_MME)
&& (UE_rrc_inst[Mod_id].initialNasMsg.data != NULL)
#endif


git-svn-id: http://svn.eurecom.fr/openair4G/trunk@4818 818b1a75-f10b-46b9-bf7c-635c3b92a50f