This is part of a bunch of fixes for gcc complaining about
-Wmissing-declarations.
It puts functions into headers and includes those headers both where the
functions are defined and where they function are used.
This is a subclass of GEmblemedIcon that can show a number or
short string as an emblem, overlayed on top of another emblem.
Written by Cosimo Cecchi
https://bugzilla.gnome.org/show_bug.cgi?id=637169
