test-int2str.c: Use g_snprintf()
test-int2str.c: Use g_snprintf()

snprintf() is not available on all platforms, and may work differently
depending on the CRT implementation.  Use the g_snprintf() from GLib
instead, since this is already GLib-using code.

GNOME/gtksourceview,GNOME/gtksourceview,GNOME/gtksourceview,GNOME/gtksourceview,GNOME/gtksourceview,GNOME/gtksourceview,GNOME/gtksourceview,GNOME/gtksourceview,GNOME/gtksourceview,GNOME/gtksourceview,GNOME/gtksourceview,GNOME/gtksourceview,GNOME/gtksourceview,GNOME/gtksourceview,GNOME/gtksourceview