Return "" for entry->invisible_char == 0, otherwise N copies of

Return "" for entry->invisible_char == 0, otherwise N copies of

Mon Oct 21 14:04:39 2002  Owen Taylor  <otaylor@redhat.com>

        * gtk/gtkentry.c (gtk_entry_get_public_chars): Return
        "" for entry->invisible_char == 0, otherwise N copies
        of entry->invisible_char. (#95486, Vitaly Tishkov)

        * gtk/gtkentry.c: Fix a bunch of places where entry->text
        instead of layout->text was being used for computation
        of offsets/indices in the layout. Using layout->text
        is necessary because when the entry is invisible, it
        doesn't correspond to entry->text.