TINY-1511: fixed issue with CaretPosition not handling zero rects correctly
TINY-1511: fixed issue with CaretPosition not handling zero rects correctly

tinymce/tinymce,FernCreek/tinymce,danielpunkass/tinymce,TeamupCom/tinymce,tinymce/tinymce,TeamupCom/tinymce,FernCreek/tinymce,danielpunkass/tinymce,FernCreek/tinymce,danielpunkass/tinymce,tinymce/tinymce