Array out-of-bounds reference in xLAQR5.

Array out-of-bounds reference in xLAQR5.

Bug report and fix from Mathew Cross (NAG) on Sat Aug 14 2010:

In the section of the code "Special case: 2-by-2 reflection (if needed)" the logical test
IF( BMP22 .AND. ( V( 1, M22 ).NE.ZERO ) )
must be split into a nested test
IF (BMP22) THEN, IF (V(1,M22).NE.ZERO) THEN...
If .NOT. BMP22 then M22 can exceed the second extent of V (and recall that logical expressions can be evaluated in any order in Fortran).

See http://icl.cs.utk.edu/lapack-forum/viewtopic.php?f=2&t=1949.