fix bad condition in prv_find_object()
fix bad condition in prv_find_object()

kartben/liblwm2m,Passific/liblwm2m,javiergp/liblwm2m,ismagom/lwm2m-galileo,dientaufan/liblwm2m,sbernard31/liblwm2m,1248/liblwm2m,ismagom/lwm2m-galileo,marcostoc/liblwm2m,msangoi/liblwm2m,01org/liblwm2m,domedambrosio/liblwm2m,msangoi/liblwm2m,fab13n/liblwm2m