fix a segfault in "slice vectorization" when the destination might not be aligned on a scalar (complex<double>)
fix a segfault in "slice vectorization" when the destination might not be aligned on a scalar (complex<double>)

cjntaylor/eigen,cjntaylor/eigen,pthulhu/eigen,pthulhu/eigen,cjntaylor/eigen,pthulhu/eigen,pthulhu/eigen,pthulhu/eigen,cjntaylor/eigen