yang parser BUGFIX null dereference in moveto_resolve_model
yang parser BUGFIX null dereference in moveto_resolve_model

Check whether mod is null before checking if it is implemented in moveto_resolve_model for
models of an unknown format.

sartura/libyang,sartura/libyang,sartura/libyang,sartura/libyang,CESNET/libyang,CESNET/libyang,sartura/libyang,sartura/libyang