--- a/liboctave/idx-vector.h	Tue Feb 09 11:43:03 2010 +0100
+++ b/liboctave/idx-vector.h	Tue Feb 09 12:56:47 2010 +0100
@@ -287,6 +287,9 @@
     // Zero-based constructor.
     idx_vector_rep (const Array<octave_idx_type>& inda);
 
+    idx_vector_rep (const Array<octave_idx_type>& inda,
+                    octave_idx_type _ext, direct);
+
     template <class T>
     idx_vector_rep (const Array<T>&);
 
@@ -473,6 +476,11 @@
     : rep (new idx_vector_rep (inda))
     { chkerr (); }
 
+  // Directly pass extent, no checking.
+  idx_vector (const Array<octave_idx_type>& inda, octave_idx_type ext) 
+    : rep (new idx_vector_rep (inda, ext, DIRECT))
+    { }
+
   // Colon is best constructed by simply copying (or referencing) this member.
   static const idx_vector colon;