OGRE (O-O Graphics Rendering Engine)

Hi,

got rid of all warnings from nvparse (RenderSystems/GL/nvparse) that are
coming out with GCC 4.3. Almost all are const issues with char, except for
one truncation issue that I'm not 100% sure about ( started topic about it
in http://www.ogre3d.org/forums/viewtopic.php?f=2&t=48647 ) - together with
tickets 2694668 and 2690692 this fix all warnings I spot till today (wasn't
testing EXRCodec plugin that is deprecated or Tests that's trunk version
doesn't build currently at all in gcc4.3 or some tools that are not in
standard build, but other plugins, core, default tools and samples build
without single glitch with those)

cheers,
Andrzej.