Bug in Magick-conifg --version output in 6.3.7-6

[rmagick]

The quantum depth is missing:

$ convert --version
Version: ImageMagick 6.3.7 12/20/07 Q16 http://www.imagemagick.org
Copyright: Copyright (C) 1999-2008 ImageMagick Studio LLC
$ Magick-config --version
6.3.7 Q@MAGICKCORE_QUANTUM_DEPTH@

[magick]

Will have a fix for this problem by tomorrow. Thanks.