Merge pull request #7907 from sloriot/T3-OFB_warning

Prevent out-of-bound warnings

TDS_3/include/CGAL/Triangulation_utils_3.h

@@ -80,6 +80,7 @@ struct Triangulation_utils_3
     CGAL_triangulation_precondition( ( i >= 0 && i < 4 ) &&
                                      ( j >= 0 && j < 4 ) &&
                                      ( i != j ) );
+    CGAL_assume(i!=j);
     return tab_next_around_edge[i][j];
   }