mtl2lapack bug

Hi all, 

First of all, we greatly appreciate mtl. 

Using orgqr from the mtl2lapack interface on Redhat Linux 7.3, I got a
small compile error (version mtl-2.1.2-21). I think this problem is not
platform-specific, and should show up on more platforms. Anyway, the fix
is attached. 

Greetings, 

	René
-- 
M.M. (René) van Paassen                    [email protected]
Assistant Professor                                tel. +31 15 278 5370
Faculty of Aerospace Engineering                   fax. +31 15 278 6480
Kluijverweg 1, NL-2629 HS  Delft         Delft University of Technology 
         >>>>>>>>>>>> http://www.cs.lr.tudelft.nl <<<<<<<<<<<<

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diff -Naur mtl-2.1.2-21.orig/mtl/mtl2lapack.h mtl-2.1.2-21/mtl/mtl2lapack.h
--- mtl-2.1.2-21.orig/mtl/mtl2lapack.h	Sat Jul  6 17:48:35 2002
+++ mtl-2.1.2-21/mtl/mtl2lapack.h	Thu Jan 30 12:27:28 2003
@@ -1125,8 +1125,9 @@
     int m = a.nrows();
     int n = a.ncols();
     int info;
+    typedef typename VectorT::value_type VT;
     mtl_lapack_dispatch::orgqr(m, n, tau.size(), a.data(), lda,
-			       tau.data(), info);
+			       const_cast<VT*>(tau.data()), info);
     return info;
   }