Fixed the code so that it works properly with the new row vector

range() rather than the previous column vector range().

--HG--
extra : convert_revision : svn%3Afdd8eb12-d10e-0410-9acb-85c331704f74/trunk%402901

dlib/matrix/matrix_lu.h

@@ -111,7 +111,7 @@ namespace dlib
         // Use a "left-looking", dot-product, Crout/Doolittle algorithm.
 
 
-        piv = range(0,m-1);
+        piv = trans(range(0,m-1));
         pivsign = 1;
 
         column_vector_type LUcolj(m);