Remove duplicate warnings for immediate overflow
Remove duplicate warnings for immediate overflow

For immediates, we had one overflow test in the bytecode interpreter
(in most cases via warn_overflow_opd()) and one in out(); this meant
we got two warnings instead of one every time.  Replace with only the
one in out().

Signed-off-by: H. Peter Anvin <8a453bad9912ffe59bc0f0b8abe03df9be19379e@linux.intel.com>

techkey/nasm,techkey/nasm,techkey/nasm,techkey/nasm,techkey/nasm