added check for transfig and AM_CONDITIONAL BUILD_FIGURES
added check for transfig and AM_CONDITIONAL BUILD_FIGURES


git-svn-id: cdc35f08bacdb438f6e367acc312f03ce975f7ef@3315 67ed7778-7388-44ab-90cf-0a291f65f57c

gphoto/libgphoto2.OLDMIGRATION,gphoto/libgphoto2.OLDMIGRATION,gphoto/libgphoto2.OLDMIGRATION,gphoto/libgphoto2-sharp,gphoto/libgphoto2.OLDMIGRATION,gphoto/libgphoto2-python,gphoto/libgphoto2-sharp