Modified applications

• COMPADD now correctly processes NDFs with more than two axes.
• COMPAVE now correctly processes NDFs with more than two axes.
• DISPLAY changed to avoid a spurious error previously reported if double precision data are displayed which requires compression to fit in the display.
• DIV now stores standard Starlink bad values in the output NDF for any pixel where the denominator NDF has a zero value. This used to be the case only on Solaris. Correct behaviour on Linux and Digital UNIX has required the removal of the facility for trapping floating overflow conditions which used to be available on Solaris.
• DRAWSIG changed to avoid spurious clearing of X displays when using two or more GWM windows under ICL.
• FFCLEAN bug fixed which caused Parameter THRESH to be ignored when using a _DOUBLE data array.
• FILLBAD now ignores any input VARIANCE  component if all the variances are bad or zero. Also added protection against division by zero which occurred if the variance array contained any isolated zeros.
• FITSEDIT now creates a new FITS extension if the specified NDF does not already contain a FITS extension.
• FITSIN now creates an NDF WCS component (if possible) storing a description of any world co-ordinate systems defined in the FITS headers.
• FITSDIN now creates an NDF WCS component (if possible) storing a description of any world co-ordinate systems defined in the FITS headers.
• LINPLOT changed to avoid spurious clearing of X displays when using two or more GWM windows under ICL.
• PARGET bug fixed which caused the application to terminate if the specified parameter is an array with only a single element.
• ROTATE bug fixed which prevented two-dimensional slices from n-dimensional cubes being processed.
• TRANMAKE no longer reports a compilation error if a null value is given for Parameter CLASS.

The following applications now propagate the WCS component of an NDF structure:

ADD ARDMASK BLOCK CADD CALPOL CDIV CHPIX CMULT COMPADD COMPAVE COMPICK CONVOLVE CSUB DISPLAY DIV ERRCLIP FFCLEAN FILLBAD FLIP GAUSMOOTH GREYPLOT HISTEQ INSPECT LUCY MAKESURFACE MATHS MEDIAN MEM2D MULT NDFCOPY NOMAGIC NORMALIZE PASTE PIXDUPE RIFT ROTATE SEGMENT SETMAGIC SHADOW SUB SUBSTITUTE SURFIT THRESH WIENER ZAPLIN