Bug in real.c rewrite

[law@redhat.com]

In message <20030225230552.GD13285@redhat.com>, Richard Henderson writes:
 >Ho hum.  There actually _isn't_ a way to indicate signed or unsigned
 >during the conversion.
 >
 >I recall now that this form of overflow is something that Alan Modra
 >talked me into at the time.  I'm now thinking that this is more trouble
 >that it's worth, trying to force a particular result for a value that's
 >technically undefined.  So I've reverted the change.
 >
 >
 >r~
 >
 >
 >        * real.c (real_to_integer2): Force overflow result only for 
 >        unsigned overflow.
Thanks.  That fixes the execute/conversion.c and ieee/rbug.c failures
on the tree-ssa branch :-)

jeff