CDRIVER-2852 check return value of iter_init
CDRIVER-2852 check return value of iter_init

acmorrow/mongo-c-driver,acmorrow/mongo-c-driver,mongodb/mongo-c-driver,acmorrow/mongo-c-driver,rcsanchez97/mongo-c-driver,jmikola/mongo-c-driver,mongodb/mongo-c-driver,beingmeta/mongo-c-driver,jmikola/mongo-c-driver,acmorrow/mongo-c-driver,beingmeta/mongo-c-driver,jmikola/mongo-c-driver,acmorrow/mongo-c-driver,beingmeta/mongo-c-driver,rcsanchez97/mongo-c-driver,mongodb/mongo-c-driver,mongodb/mongo-c-driver,derickr/mongo-c-driver,derickr/mongo-c-driver,derickr/mongo-c-driver,beingmeta/mongo-c-driver,rcsanchez97/mongo-c-driver,derickr/mongo-c-driver,mongodb/mongo-c-driver,jmikola/mongo-c-driver,rcsanchez97/mongo-c-driver,mongodb/mongo-c-driver,beingmeta/mongo-c-driver,derickr/mongo-c-driver,jmikola/mongo-c-driver,derickr/mongo-c-driver,mongodb/mongo-c-driver,derickr/mongo-c-driver,rcsanchez97/mongo-c-driver,jmikola/mongo-c-driver,beingmeta/mongo-c-driver,acmorrow/mongo-c-driver,acmorrow/mongo-c-driver,beingmeta/mongo-c-driver,rcsanchez97/mongo-c-driver,jmikola/mongo-c-driver,beingmeta/mongo-c-driver,rcsanchez97/mongo-c-driver