multi_array constructors from the other array types are now based on a

common const_multi_array_ref constructor, which also handles the
default constructor.


[SVN r22023]

libs/multi_array

@@ -1 +1 @@
-Subproject commit d9bbf4621380d7f5765b6f18b52006685d8a5d86
+Subproject commit 26ec9fd1f0a4b08bb4760c428b67d1a8bde76eb2