Fixing a bug due to which the error estimate for the bias stripe correction for *a single pixel in a row* is added, in quadrature, to all other pixels in the same row. Each pixel should have individualized error estimates. The errors in the computation of the `ERR` array due to this bug were below 0.01%.
Fixing a bug due to which the error estimate for the bias stripe correction for *a single pixel in a row* is added, in quadrature, to all other pixels in the same row. Each pixel should have individualized error estimates. The errors in the computation of the `ERR` array due to this bug were below 0.01%.


git-svn-id: ae5d535d8549566df64d2c38e8f7097ffa427e83@38479 fe389314-cf27-0410-b35b-8c050e845b92

jhunkeler/acstools