enable mxm2 from np>0

reviewed by yossi
cmr:v1.7.3:reviewer=jsquyres

This commit was SVN r29178.

ompi/mca/mtl/mxm/mtl_mxm_component.c

@@ -76,7 +76,7 @@ static int ompi_mtl_mxm_component_register(void)
     ompi_mtl_mxm.mxm_np = 0;
 #else
     ompi_mtl_mxm.mxm_np = 128;
-#if
+#endif
     (void) mca_base_component_var_register(c, "np",
                                            "[integer] Minimal number of MPI processes in a single job "
                                            "required to activate the MXM transport",