[REL20] Compilation error

[REL20] Compilation error

When I compile REL20 devbranch, I get this error while make:

[code]
[ 42%] Building CXX object src/game/CMakeFiles/game.dir/SpellMgr.cpp.o
/home/mangos/mangoszero/server_rel20/src/game/SpellMgr.cpp: In member function ‘void SpellMgr::ModDBCSpellAttributes()’:
/home/mangos/mangoszero/server_rel20/src/game/SpellMgr.cpp:1851:25: error: range-based-for loops are not allowed in C++98 mode
make[2]: *** [src/game/CMakeFiles/game.dir/SpellMgr.cpp.o] Error 1
make[1]: *** [src/game/CMakeFiles/game.dir/all] Error 2
make: *** [all] Error 2
[/code]

Wanted to test Rel20, but it's not possible yet.