While setting float fields they need to be cast to double first. Fixes issue 2.
While setting float fields they need to be cast to double first. Fixes issue 2.

git-svn-id: 99137e3b38d0603de25cf210fea31637cad7780b@55 4a3e2f78-2e7b-11de-9b0f-33ff132f608d

hmeine/pylibtiff,coruus/pylibtiff,coruus/pylibtiff,hmeine/pylibtiff