Bug#576599: texlive-xetex requires lmodern fonts

[Raphael Frey <freyraphael@lavabit.com>]

As I have assumed, the Latin Modern fonts are the default fonts for
Xetex documents – as important as the Computer Modern fonts for Latex
documents. See the documentation of Xetex: “fontspec defines a new LATEX
font encoding for its purposes to allow the Latin Modern fonts to be
used by default.” However, with the ‘fontspec’ option ‘[cm-default]’ it
is possible to ignore the Latin Modern fonts, but this option is not
default (!). Therefore and because the Computer Modern fonts are
included in package ‘texlive-base’ so that these fonts are included in
the most minimal Texlive installation, I think the ‘lmodern’ package
should not only be a recommendation of ‘texlive-xetex’ but a dependency.

Best regards

Raphael