i386-mingw32-runtime fails

[Rolf Howarth]

I'm new to MacPorts but having a few problems.

% sudo port sync
% sudo port install i386-mingw32-runtime
--->  Fetching i386-mingw32-runtime
--->  Attempting to fetch mingwrt-3.15.2-mingw32-dev.tar.gz from 
http://kent.dl.sourceforge.net/mingw
--->  Verifying checksum(s) for i386-mingw32-runtime
Error: Checksum (md5) mismatch for mingwrt-3.15.2-mingw32-dev.tar.gz
Error: Checksum (sha1) mismatch for mingwrt-3.15.2-mingw32-dev.tar.gz
Error: Checksum (rmd160) mismatch for mingwrt-3.15.2-mingw32-dev.tar.gz
Error: Target org.macports.checksum returned: Unable to verify file checksums
Error: Status 1 encountered during processing.

There's a trac ticket http://trac.macports.org/ticket/19582 on this 
which shows the correct checksums but the patch hasn't been applied 
and despite a sync my Portfile still has the incorrect old checksum.

If I try to edit Portfile myself I then get
Error: Unable to open port: Usage: sha1 file ?file?

-Rolf