Fix display crash OOB when items exist on first render of top
#43
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The number of columns used to be calculated from the number of
display-column-widths
. On first render, this is nil, becauseneeds-resize
ist
, and nothing has yet been calculated. This however still worked so long the buffer rendered once before adding new entires. If entries existed on first render, the column count would be 0.Fix by calculating column count off of
header-widths
, which is always set correctly.Fixes #40