Fix documentation image printing under new development code Printed images are now clipped to image size rather than to papersize of 8.5x11 Images are scaled to 4 inches and centered in display pdf printing is sub-optimal as texi2pdf picks the png rendering (bitmap) rather than the pdf rendering (vector).

      subroutine xzdotc (n, zx, incx, zy, incy, retval)
      double complex zdotc, zx(*), zy(*), retval
      integer n, incx, incy
      external zdotc
      retval = zdotc (n, zx, incx, zy, incy)
      return
      end