The option table now requires passing of a pointer to user-defined data, similar in spirit to that used in Xt or TK callbacks.  If unused, simply initialize as NULL.  All option handlers changed to accept this pointer as the third argument.  Especially useful from C++ for passing the "this" pointer.
The option table now requires passing of a pointer to user-defined data,
similar in spirit to that used in Xt or TK callbacks.  If unused, simply
initialize as NULL.  All option handlers changed to accept this pointer
as the third argument.  Especially useful from C++ for passing the "this"
pointer.

svn path=/trunk/; revision=437

FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot