[remove unused variable, also remove the switch to the GL_BACK buffer
Andreas Röver <roever@users.sourceforge.net>**20060222172026] {
hunk ./src/gui/ImageExport.cpp 83
-  glDrawBuffer(GL_BACK);
-  glReadBuffer(GL_BACK);
-
-  ShadowView dr(view3D->getView());
-
hunk ./src/gui/ImageExport.cpp 278
-  glDrawBuffer(GL_FRONT);
-  glReadBuffer(GL_FRONT);
-
}
