/* Initialize empty WinMeta "wmeta" on the terminal "screen". (Note that
* emptiness is marked by WinMeta.chain_start=0.) Other struct members are also
* initialized 0, except for the virtual screen (height = that of the terminal
/* Initialize empty WinMeta "wmeta" on the terminal "screen". (Note that
* emptiness is marked by WinMeta.chain_start=0.) Other struct members are also
* initialized 0, except for the virtual screen (height = that of the terminal