Silence a pointless "warn_unused_result" warning on linux


git-svn-id: svn+ssh://svn.code.sf.net/p/xmds/code/trunk/xpdeint@2832 41b19578-b77a-4e3b-9682-c8570d237623
Correct the documentation of the "XMDS" Fourier transform.

The wrong normalisation was used, we use the unitary Fourier transform which has a 1/sqrt(2\pi) out the front, not 1/(2\pi).

git-svn-id: svn+ssh://svn.code.sf.net/p/xmds/code/trunk/xpdeint@2833 41b19578-b77a-4e3b-9682-c8570d237623
Correct an error message to list the valid types of 'operator's available in an operators block

git-svn-id: svn+ssh://svn.code.sf.net/p/xmds/code/trunk/xpdeint@2834 41b19578-b77a-4e3b-9682-c8570d237623