on windows+MSVC, debug builds of the library now have a 'd' suffix.

on windows+MSVC, debug builds of the library now have a 'd' suffix.
freeglutdll.def was edited to no longer include the name of teh library
that would clash with this
and freeglut_std.h was edited to specify linking to the right library
when building in debug mode

git-svn-id: svn+ssh://svn.code.sf.net/p/freeglut/code/trunk/freeglut/freeglut@1322 7f0cb862-5218-0410-a997-914c9d46530a