0022124: [CEA 763] Projection 1D does not work with Netgen 1D2D

0022124: [CEA 763] Projection 1D does not work with Netgen 1D2D

- class StdMeshers_ProjectionUtils
+ namespace StdMeshers_ProjectionUtils

+  /*!
+   * \brief Returns an error message to show in case if MakeComputed( sm ) fails.
+   */
+  std::string SourceNotComputedError( SMESH_subMesh * sm = 0,
+                                      SMESH_Algo*     projAlgo=0);