fix stupid warning with old GCC
fix stupid warning with old GCC

pasuka/eigen,ritsu1228/eigen,toastedcrumpets/eigen,ROCmSoftwarePlatform/hipeigen,TSC21/Eigen,pasuka/eigen,TSC21/Eigen,ritsu1228/eigen,ritsu1228/eigen,ROCmSoftwarePlatform/hipeigen,TSC21/Eigen,ROCmSoftwarePlatform/hipeigen,toastedcrumpets/eigen,pasuka/eigen,TSC21/Eigen,toastedcrumpets/eigen,ROCmSoftwarePlatform/hipeigen,ritsu1228/eigen,pasuka/eigen,pasuka/eigen,ritsu1228/eigen,toastedcrumpets/eigen