Fixed a bug that resulted in an error when adding a sample to a project when it was already associated with that project.
Fixed a bug that resulted in an error when adding a sample to a project when it was already associated with that project.

git-svn-id: 254b55ed5af74be1d7d70afec450d37b329a3231@133 b159389c-fc5d-0410-935c-b53355241f03

cosmolab/chemdb,cosmolab/chemdb,cosmolab/chemdb