Patch for stricter implicit conversions between vectors

[Mark Shinwell]

Gerald Pfeifer wrote:
> On Tue, 14 Nov 2006, Mark Shinwell wrote:
>> This patch is an implementation of the strategy decided in the
>> thread starting at http://gcc.gnu.org/ml/gcc/2006-10/msg00682.html.
> 
> Would you mind also adding a note to htdocs/gcc-4.3/changes.html in our 
> wwwdocs CVS repository once this is in?

Sure.  (I expect to get to the final round of testing for this in the
next couple of days.)

Mark