removing graphics.h from stamp-prereq in src/Makefile.in

[Shai Ayal]

Is it OK to remove graphics.h from the list of dependencies of
stamp-prereq in  src/Makefile.in?
I might be missing something, but as far as I see graphics.h is only
needed bu graphics.cc and mex.h, and so it is not really important to
recompile all the def files etc.. every time it is changed. This would
go a long way towards enhancing the development experience of certain
individuals with slow machines ...


Shai