The svd code contains some index trickery, because the original code
was written in fortran, which numbers arrays starting from '1'
rather than from '0'.  This trickery included having a pointer point
1 int in front of an allocated array, implicitly relying on the
fact that pointer[0] would never be called.  The llvm sanitizer
complains nevertheless, so this patch improves the trickery a little
to avoid the objected pointer.

[[Imported from SVN: r7206]]

[[Imported from SVN: r7039]]

[[Imported from SVN: r5931]]

[[Imported from SVN: r5581]]

[[Imported from SVN: r5559]]

[[Imported from SVN: r1031]]