In case someone gets similar error:
dpkg-shlibdeps: failure: no dependency information found for /home/ab/.madde/0.5/sysroots/fremantle-qt-arm-sysroot-0942/usr/lib/libQtGui.so.4 (used by debian/qthello/usr/bin/qthello).
dh_shlibdeps: command returned error code 512

I filed bug https://bugs.maemo.org/show_bug.cgi?id=7350

Change ~/.madde/0.5/madbin/dpkg according to a proposed patch and you should be OK.