WARNING
=======
Libpng 1.6 does not use the default run-time library when building static
library builds of libpng; instead of the shared DLL runtime it uses a static
runtime.  If you need to change this make sure to change the setting on all the
relevant projects:

libpng
zlib
all the test programs

The runtime library settings for each build are as follows:

           Release        Debug
DLL         /MD            /MDd
Library     /MT            /MTd

NOTICE that libpng 1.5 erroneously used /MD for Debug DLL builds; if you used
the debug builds in your app and you changed your app to use /MD you will need
to change it to /MDd for libpng 1.6.

The Visual Studio 2010 defaults for a Win32 DLL or Static Library project are
as follows:

                 Release     Debug
DLL               /MD         /MDd
Static Library    /MD         /MDd