message: remove erroneous CMake check
diff: @@ -65,13 +65,8 @@ ENDIF()
  # qt-based viewer for geometry (and soon volumes)
  IF(NOT (APPLE AND OSPRAY_COMPILER_ICC) AND NOT WIN32)
  OPTION(OSPRAY_APPS_QTVIEWER "Build ospQtViewer (Qt-based model viewer)" ON)
  - IF (OSPRAY_APPS_QTVIEWER)
  - if (NOT OSPRAY_APPS_SG)
  - message(ERROR "OSPRAY_APPS_SG required to build OSPRAY_APPS_QTVIEWER")
  - endif()
  ADD_SUBDIRECTORY(qtViewer)
  ENDIF()
  -ENDIF()
  # volume viewer application
  IF(NOT (APPLE AND OSPRAY_COMPILER_ICC))
  