Use G_MAXUINT instead of G_MAXUINT32 as max guint value
Use G_MAXUINT instead of G_MAXUINT32 as max guint value

ovirt_utils_guint_from_string() converts a guint from a string, but was
reporting overflow when the converted value is bigger than G_MAXUINT32.
As we are handling a guint, it's better to use G_MAXUINT as the limit.

etrunko/libgovirt,etrunko/libgovirt,GNOME/libgovirt