DU17 Patch

A small patch for Digital Universe 1.7 to version 1.7 update 1.

This fixes a couple of minor bugs.

A backup copy of your current DigitalUniverse executable is made in case of any
problems in the process. The backup copy is called DU17.bak.

The patch will only update the installed Digital Universe v1.7 exectuable with
compile date 25/12/2012, it will not try to patch the updated file or indeed any
other version of DU.



Update 1 fixes the following.

1. Several memguard hits have been eliminated. Thanks go to
Roman Kargin aka Kas1e for pointing out these hits.

2. Since rtg.library (53.31) and later, it has been possible
to use transparent text with the SetRPAttrs() function.
Previous versions treated the text as opaque regardless of
the alpha value used. This had the effect of rendering some
of the text in Digital Universe invisible, the constellation
names being one example. 



This update uses the freely available GPatch copyright
Ralf Gruner (ralf.gruner()t-online.de) whose application
is greatly appreciated.