Include files outside of the extern "C" block. Makes some C++ compiler

Include files outside of the extern "C" block. Makes some C++ compiler

2000-07-19  Sebastian Wilhelmi  <wilhelmi@ira.uka.de>

	* gdk-pixbuf/gdk-pixbuf.h, gtk/gtkhsv.h, gtk/gtktextbtree.h,
	gtk/gtktextbuffer.h, gtk/gtktextchild.h, gtk/gtktextdisplay.h,
	gtk/gtktextiter.h, gtk/gtktextiterprivate.h, gtk/gtktextlayout.h,
	gtk/gtktextmarkprivate.h, gtk/gtktextsegment.h, gtk/gtktexttag.h,
	gtk/gtktexttagtable.h, gtk/gtktexttypes.h, gtk/gtktextview.h,
	gtk/gtktypeutils.h: Include files outside of the extern "C"
	block. Makes some C++ compiler happy. Reported by Denis Vakatov
	<vakatov@peony.nlm.nih.gov>.

	I really hope not to have caused a merging nightmare for all
	the branches out there. Otherwise I'll be available for crucifixion.