fix bug discovered by Frank: ei_alloc_stack must really return aligned pointers
fix bug discovered by Frank:
ei_alloc_stack must really return aligned pointers

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