Fixed errors in fl_read_image() and Fl_Paged_Device::print_window_part() 
when using Apple computers with retina displays.

git-svn-id: http://seriss.com/public/fltk/fltk/branches/branch-1.3@10371 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
Improved Fl_Paged_Device::print_window() when used on an Apple computer with a retina display:
the window tittle bar is printed at high resolution.

git-svn-id: http://seriss.com/public/fltk/fltk/branches/branch-1.3@10372 ea41ed52-d2ee-0310-a9c1-e6b18d33e121