[daip] CHINC in IMAGR history file

[Eric Greisen]

Andy Biggs wrote:
> Hi there. There's a tiny bug that I've been meaning to mention for years. It seems that IMAGR writes either the value of NCHAV or ECHAN to CHINC. This is occasionally confusing. I always set ECHAN=NCHAV as I'm making a wide-field continuum map from a spectral line dataset, but CHINC is left at 1.
> 
> Andy
> 
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IMAGR overrides your value on input since you have made all channels go 
into 1.  That valuie then appears in the history.

Eric Greisen