Give sorted configs a unique ID without changing the original set TRAC #12323 This fixes building on Visual C++ 2010, which has const iterators for STL sets as specified by C++0x. Signed-off-by: Shannon Woods Singed-off-by: Daniel Koch Author: Nicolas Capens git-svn-id: https://angleproject.googlecode.com/svn/trunk@302 736b8ea6-26fd-11df-bfd4-992fa37f6226