fix of AddGhostImplementation when in base interface (not the type being analysed)
fix of AddGhostImplementation when in base interface (not the type being analysed)

git-tfs-id: [http://falcon:8080/tfs/Projects]$/Phalanger/Main;C2135

DEVSENSE/Phalanger,diddledan/Phalanger,kendallb/Phalanger,kendallb/Phalanger,kendallb/Phalanger,DEVSENSE/Phalanger,diddledan/Phalanger,kendallb/Phalanger,DEVSENSE/Phalanger,kendallb/Phalanger,diddledan/Phalanger,DEVSENSE/Phalanger,diddledan/Phalanger,diddledan/Phalanger,kendallb/Phalanger,DEVSENSE/Phalanger,DEVSENSE/Phalanger