* src/devices/grohtml/post-html.cpp: Use casts to `char *' if using

* src/devices/grohtml/post-html.cpp: Use casts to `char *' if using
`a_delete' for `const char *'.

* src/devices/grohtml/post-html.cpp,
src/devices/grohtml/html-table.cpp,
src/devices/grohtml/html-text.cpp, src/devices/grohtml/output.cpp:
Replace malloc/free with new/delete/a_delete.

* src/devices/grolbp/lbp.h: Remove superfluous semicolons which
are prohibited with ANSI C++.
(lbpprintf, vdmprintf): Remove useless `inline' keyword (since the
function has a variable number of arguments).

* src/preproc/grn/main.cpp (doinput): Change return type to `int'.
Simplify function and update all callers.