The global variable holding the native address of the I/O page is spelled "IOPage"
The global variable "IOPage" is declared extern by "lspglob.h"
The structure pointed to by IOPage is named IOPAGE and is defined in "iopage.h"
If there is no direct reference to the IOPAGE struct do not include "iopage.h"
* Remove code for unsupported Sun display configurations
Initial cleanup removing all code that was #ifdef'd for SUNDISPLAY.
Other SunWindows dependent code may also be removeable
* prropstyle will never be defined with no SunWindows support and therefore no pixrect code
* Remove code that is ifndef NOPIXRECT, since pixrects are part of the obsolete Sun windows code.
There are still traces of pixrect dependent code that could be removed.
Except where the expansion would be syntactically invalid,
for example "goto macroarg;" detection of which is a bug in clang-tidy,
so warn it off with a NOLINT...(bugprone-macro-parentheses)
As a prerequisite for cleaning up some other include issues, all the
include files in inc/ should have an include guard. All the xxxdefs.h
were created with them, but most older files were not.
