Refine r43095: -Wno-strict-overflow only exists since GCC 4.2
Refine r43095: -Wno-strict-overflow only exists since GCC 4.2


git-svn-id: ecbadac9c76e8cf640a0bca86f6bd796c98521e3@43819 27541ba8-7e3a-0410-8455-c3a389f83636

bbannier/ROOT,bbannier/ROOT,bbannier/ROOT,bbannier/ROOT,bbannier/ROOT,bbannier/ROOT,bbannier/ROOT