Fixed gtk_entry_set_icon_tooltip_text & markup to not crash
Fixed gtk_entry_set_icon_tooltip_text & markup to not crash

Setting this property before the icon is actually set was
resulting in a crash (found by way of Glade bug 606103).

Unity-Technologies/gtk,Distrotech/gtk,Distrotech/gtk,johne53/MB3Gtk-2,johne53/MB3Gtk-2,johne53/MB3Gtk-2,johne53/MB3Gtk-2,Unity-Technologies/gtk,Unity-Technologies/gtk,Unity-Technologies/gtk,Unity-Technologies/gtk,Distrotech/gtk,johne53/MB3Gtk-2,Distrotech/gtk,Distrotech/gtk