8012927: 'assert(nbits == 32 || (-(1 << nbits-1) <= x && x < ( 1 << nbits-1))) failed: value out of range' in interpreter initialization. Summary: Change br_null_short() to br_null(). Reviewed-by: coleenp, hseigel
8012927: 'assert(nbits == 32 || (-(1 << nbits-1) <= x && x < ( 1 << nbits-1))) failed: value out of range' in interpreter initialization.
Summary: Change br_null_short() to br_null().
Reviewed-by: coleenp, hseigel

wdv4758h/ZipPy,wdv4758h/ZipPy,wdv4758h/ZipPy,wdv4758h/ZipPy,wdv4758h/ZipPy,wdv4758h/ZipPy,wdv4758h/ZipPy,wdv4758h/ZipPy