Changes in global variables

extern struct meta

{

	long Nmeasures,Nmeasures0;

        long Nvis,Nvis0;

        long Nweights,Nweights0;

        long freq_per_chan,freq_per_chan0;

        long polarisations,polarisations0;

        long Ntimes,Ntimes0;

        double dt,dt0;

        double thours,thours0;

        long baselines,baselines0;

        double uvmin,uvmin0;

        double uvmax,uvmax0;

        double wmin,wmin0;

        double wmax,wmax0;

	long Nmeasures;

        long Nvis;

        long Nweights;

        long freq_per_chan;

        long polarisations;

        long Ntimes;

        double dt;

        double thours;

        long baselines;

        double uvmin;

        double uvmax;

        double wmin;

        double wmax;

} metaData;