o Fix type-derivation for the basic DOUBLE-DOUBLE-FLOAT arithmetic
operations. The deftransforms were causing type-derivation to return DOUBLE-DOUBLE-FLOAT for everything. Use the suggestion from Rob: Wrap the result of the deftransform in a TRULY-THE form and use the node derived type for the type. o The FLOAT-SIGN deftransform for DOUBLE-DOUBLE-FLOAT should be conditioned on the DOUBLE-DOUBLE feature. o Remove old unused deftransform for * for two double-double args.