#111 \textheight should be changed

Although styles changes the area, where is possible to
put text, the \textheight is not changed. It is
viewable by the following example:

\begin{slide}{}
\rule{\textwidth}{\textheight}
\end{slide}

And try various prosper styles.

[Anonymous]

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user_id=859902

The solution can be e.g.

\let\prosperslide=\slide
\let\prosperendslide=\endslide
\renewenvironment{slide}[2][Replace]{%
\prosperslide[#1]{#2}
\advance\textheight -\subheight%
}{\prosperendslide}

Where \subheight should be some length specific for the
given environment. Every author of a certain prosper style
should do this.