fixed stack corruption in send_request()
fixed stack corruption in send_request()

joaopedrotaveira/libcoap,fredericgermain/libcoap,sgso/libcoap,markushx/libcoap,joaopedrotaveira/libcoap,PolymorhicCode/libcoap,pabigot/libcoap,pabigot/libcoap,gebart/libcoap,alexaring/libcoap,markushx/libcoap,nmacs/libcoap,fredericgermain/libcoap,nmacs/libcoap,sgso/libcoap,RIOT-OS/libcoap,alexaring/libcoap,gebart/libcoap,pabigot/libcoap,RIOT-OS/libcoap,OlegHahm/libcoap,fredericgermain/libcoap,thecodemaiden/libcoap-fork,gebart/libcoap,nmacs/libcoap,sgso/libcoap,authmillenon/libcoap,markushx/libcoap,OlegHahm/libcoap,OlegHahm/libcoap,authmillenon/libcoap,thecodemaiden/libcoap-fork,authmillenon/libcoap,joaopedrotaveira/libcoap,alexaring/libcoap