Bug 790: fix overflow in real_2x2_jacobi_svd
Bug 790: fix overflow in real_2x2_jacobi_svd

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