Performs basic validation of a binned dataset. Ancilliary components such as VARIANCE and QUALITY are checked for dimensional consistency with the DATA_ARRAY. Checks are also made to see if the data are stored in the most compact form, eg. regular axes stored as a spaced array. Redundent items such as QUALITY all set to good are removed as are non legal objects in the top level. VARIANCE is checked for negative values and where these are found the QUALITY is set to temporary bad (most significant bit of QUALITY byte is set). The command RESTORE can be used to reset this if the user wishes to correct the condition and use the affected data points. Everything below the MORE level is copied unchecked and unchanged.