Don't check for 'RTF ' descriptor type for conversion to rich text. E.g. when reading as data from an RTF file he type will be 'rdat', because reading as 'RTF ' is not supported.
Don't check for 'RTF ' descriptor type for conversion to rich text. E.g. when reading as data from an RTF file he type will be 'rdat', because reading as 'RTF ' is not supported.

git-svn-id: cb3fc60f0f557b927b8032d8a94e869b6f9f230b@5131 0fceea05-a30d-0410-8a8b-80ef821fb0a1

camillobruni/skim,jasongrout/skim,camillobruni/skim,jasongrout/skim,camillobruni/skim,camillobruni/skim