[Magick-bugs] convert taking a grayscale image and turning it into RGB

[duc.sequere.aut.de.via.decede at imagemagick.org]

> A break; was missing from one of the cases

We discovered this problem and fixed it a few hours ago.  The update
is already in ImageMagick subversion.  It will be available in 
ImageMagick 6.4.1-1 Beta by sometime tomorrow.