Add missing safety checks to `From<&[[A; N]]> for ArrayView` and `From<&mut [[A; N]]> for ArrayViewMut`#1131

bluss merged 2 commits intorust-ndarray:masterrust-ndarray/ndarray:masterfrom

jturner314:fix-convert-to-view-checkjturner314/ndarray:fix-convert-to-view-checkCopy head branch name to clipboard