Build with libharu2.4.3

[Daniel G.]

Hi,

currently it is not possible to build mathgl with the newest libharu version, but there is a simple fix:

in:
https://sourceforge.net/p/mathgl/code/HEAD/tree/mathgl-2x/src/prc.cpp#l962

change:
annot = HPDF_Page_Create3DAnnot (page, rect, u3d );

to:
annot = HPDF_Page_Create3DAnnot (page, rect, 0, 0, u3d, 0 );

Best regards,
Daniel G. (giri <<at>> nwrk.biz)