Bug in tds_set_server when coming through ct_connect

I have this bug report from a user:

ct_connect is defined (in ctlib/ct.c) as:
CS_RETCODE
ct_connect(CS_CONNECTION * con, CS_CHAR * servername, CS_INT snamelen)
{
       ...
       } else if (snamelen == 0 || snamelen == CS_UNUSED) {
              server = NULL;
       ...
       tds_set_server(con->tds_login, server);
       ...

Note that 'snamelen' is explicitly and intentionally allowed to be 0,
in which case the 'servername' is ignored and we pass in server=NULL
to tds_set_server.
 
In
http://freetds.cvs.sourceforge.net/viewvc/freetds/freetds/src/tds/login.c?r1=1.178&r2=1.179&,
the code to default the server name based on the $TDSQUERY or $DSQUERY
environment variables is #if'ed out and replaced by
       assert(server);
 
The comment says
        // Doing this in tds_alloc_login instead
which, while true (in tds/mem.c), does not prevent the assert from failing.


So, can you please change it to something along the lines of

-    assert(server);
-    tds_dstr_copy(&tds_login->server_name, server);
+    if (server != NULL) {
+        tds_dstr_copy(&tds_login->server_name, server);
+    }



Thanks,

-Peter