Bug#853424: gnash: ftbfs with GCC-7

[Juhani Numminen]

Control: retitle 853424 gnash: FTBFS with agg 1:2.4-r127+dfsg1-1

Hi,

This is the first warning in my build log (attached):

make[4]: Entering directory '/build/gnash-0.8.11~git20160608/tmp.build/librender'
  CXX      libgnashrender_la-Renderer_agg.lo
In file included from ../../librender/agg/Renderer_agg.cpp:146:0:
../../librender/agg/Renderer_agg_style.h: In member function 'void gnash::AddStyles::operator()(const gnash::SolidFill&) const':
../../librender/agg/Renderer_agg_style.h:617:28: error: 'rgba8_pre' is not a member of 'agg'
         _sh.add_color(agg::rgba8_pre(color.m_r, color.m_g, color.m_b,
                            ^~~~~~~~~
../../librender/agg/Renderer_agg_style.h:617:28: note: suggested alternative: 'rgba_pre'
         _sh.add_color(agg::rgba8_pre(color.m_r, color.m_g, color.m_b,
                            ^~~~~~~~~

It seems that rgba8_pre really was removed from the headers in the last
upload of agg.
https://sources.debian.org/src/agg/2.5+dfsg1-11/include/agg_color_rgba.h/#L436
https://sources.debian.org/src/agg/1:2.4-r127+dfsg1-1/include/agg_color_rgba.h

In the upstream repository, the removal was done in revision 63.
https://sourceforge.net/p/agg/svn/63/?page=2#diff-17
https://sourceforge.net/p/agg/svn/63/tree/agg-2.4/include/agg_color_rgba.h?diff=518286af2718467b8b34c637:62


Best regards,
Juhani
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