plgchr: Get character default height and current (scaled) height

`plgchr`: Get character default height and current (scaled) height
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#### `plgchr`: Get character default height and current (scaled) height

`plgchr (` | p_def,
| p_ht`)`;

Get character default height and current (scaled) height.

`p_def` (``PLFLT_NC_SCALAR``, output)

  Returned value of the default character height (mm).

`p_ht` (``PLFLT_NC_SCALAR``, output)

  Returned value of the scaled character height (mm).

Redacted form: `plgchr(p_def, p_ht)`

This function is used in example 23.

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