Fixed corruption caused by incorrect dumping of named point to SFD file.

Point's name is read by SFDReadUTF7Str(), which requires the name to
be inside double quotes or it will fail, with the added consequence
that any subsequent points in the containing spline to be lost.

Fixed by changing the printf() call to SFDDumpUTF7Str().
Merge pull request #1285 from blipvert/fixes/30

Fixed corruption caused by incorrect dumping of named point to SFD file.