lead = zebTargetInfo_lookupSU (zti, attrSet, attrUse);
if (lead < 0)
lead = zebTargetInfo_addSU (zti, attrSet, attrUse);
assert (lead > 0);
((char*) key_buf) [key_buf_used++] = lead;
lead = zebTargetInfo_lookupSU (zti, attrSet, attrUse);
if (lead < 0)
lead = zebTargetInfo_addSU (zti, attrSet, attrUse);
assert (lead > 0);
((char*) key_buf) [key_buf_used++] = lead;