Per Mark Espie <espie@nerim.net>, this fix allows PKG_CONFIG to succeed even when configuring --without-cairopango, so that the subsequent gtk+ test can be run.
Per Mark Espie <espie@nerim.net>, this fix allows PKG_CONFIG to succeed
even when configuring --without-cairopango, so that the subsequent gtk+
test can be run.

Without cairopango, the GTK driver is effectively useless, but at least
the build completes.  (I am not sure if this is what Mark is expecting.)

MjAbuz/graphviz,jho1965us/graphviz,BMJHayward/graphviz,kbrock/graphviz,MjAbuz/graphviz,pixelglow/graphviz,BMJHayward/graphviz,pixelglow/graphviz,kbrock/graphviz,jho1965us/graphviz,kbrock/graphviz,jho1965us/graphviz,jho1965us/graphviz,MjAbuz/graphviz,MjAbuz/graphviz,tkelman/graphviz,BMJHayward/graphviz,pixelglow/graphviz,pixelglow/graphviz,ellson/graphviz,MjAbuz/graphviz,tkelman/graphviz,BMJHayward/graphviz,jho1965us/graphviz,tkelman/graphviz,kbrock/graphviz,pixelglow/graphviz,jho1965us/graphviz,tkelman/graphviz,kbrock/graphviz,BMJHayward/graphviz,pixelglow/graphviz,kbrock/graphviz,tkelman/graphviz,kbrock/graphviz,ellson/graphviz,kbrock/graphviz,MjAbuz/graphviz,jho1965us/graphviz,MjAbuz/graphviz,BMJHayward/graphviz,jho1965us/graphviz,tkelman/graphviz,tkelman/graphviz,tkelman/graphviz,MjAbuz/graphviz,jho1965us/graphviz,ellson/graphviz,ellson/graphviz,BMJHayward/graphviz,MjAbuz/graphviz,pixelglow/graphviz,kbrock/graphviz,ellson/graphviz,tkelman/graphviz,ellson/graphviz,MjAbuz/graphviz,ellson/graphviz,tkelman/graphviz,BMJHayward/graphviz,ellson/graphviz,jho1965us/graphviz,pixelglow/graphviz,kbrock/graphviz,MjAbuz/graphviz,kbrock/graphviz,pixelglow/graphviz,BMJHayward/graphviz,tkelman/graphviz,ellson/graphviz,pixelglow/graphviz,pixelglow/graphviz,jho1965us/graphviz,BMJHayward/graphviz,BMJHayward/graphviz,ellson/graphviz,ellson/graphviz