Removed yellow color from image background.

This was useful for printer testing only.


git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3@7637 ea41ed52-d2ee-0310-a9c1-e6b18d33e121

test/image.cxx

@@ -124,7 +124,6 @@ int main(int argc, char **argv) {
   Fl_Double_Window window(400,400); ::w = &window;
   window.color(FL_WHITE);
   Fl_Button b(140,160,120,120,"Image w/Alpha"); ::b = &b;
-  b.color(FL_YELLOW);
 
   Fl_RGB_Image *rgb;
   Fl_Image *dergb;