v1wrappers

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These calls are wrappers to preserve the error returns of V1, that is a
negative return is the error code indicating what has gone wrong.

 sds_handle sds_define_object(sds_handle,struct type_list *,char *);
 sds_handle sds_declare_object(sds_handle, void *,
                                               char *,sds_code,sds_code);
 sds_handle     sds_load_fd(int, unsigned long, int);
 int            write_sds2socket(int , sds_handle );
 sds_handle     sds_dataset_size(sds_handle);
 int            read_socket2sds(int , int );
 sds_handle     sds_duplicate(sds_handle, char *);
 sds_handle     sds_new_index(char *);
 sds_handle     sds_use(char *,sds_code, sds_code);
 sds_handle     sds_assemble(sds_handle,char *,sds_code);
 sds_handle     sds_obname2ind(sds_handle ,char *);
 sds_handle     sds_oblike2ind(sds_handle ,char *, sds_handle);

Replaced in V2 alpha by .........................................
Here, a return of 0 indicates failure of some sort; the error code may be
had from sds_last_error() and the full error stack accessed by the error
calls (see error documentation).

 sds_handle sds_define_structure(sds_handle,struct type_list *,char *);
 sds_handle sds_declare_structure(sds_handle, void *,
                                               char *,sds_code,sds_code);
 sds_handle     sds_load_open_fd(int, unsigned long, int);
 sds_handle     sds_write2fd(int , sds_handle );
 sds_handle     sds_fullsize(sds_handle);
 sds_handle     sds_read_open_fd(int);
 sds_handle     sds_dup(sds_handle, char *);
 sds_handle     sds_new(char *);
 sds_handle     sds_access(char *,sds_code, sds_code);
 sds_handle     sds_ass(sds_handle,char *,sds_code);
 sds_handle     sds_name2ind(sds_handle ,char *);
 sds_handle     sds_like2ind(sds_handle ,char *, sds_handle);