Add Decompiler fixes for Rcp, Continue, ContinueC.

Not tested yet, but the code is straight copies of other pieces that are similar.

The main goal here is to get these past the parser failures that are presently seen.
Add data type of float1 to return DT_float.

For some reason, new games are showing float1 in the assembly, never seen anything but straight float.

Seems clearly the same though.  This will allow it to parse at least.