fix status check in dict lookup
fix status check in dict lookup

We need to check that the ix-status is strictly greater than DKIX.EMPTY.
Because only then was the slot full (and not empty) and a value was
found indeed. The went unnoticed because in the implementation for
@overload (impl_getitem) the ix-status is checked again and an
appropriate KeyError is raised.

stonebig/numba,numba/numba,stuartarchibald/numba,stonebig/numba,IntelLabs/numba,jriehl/numba,jriehl/numba,IntelLabs/numba,gmarkall/numba,seibert/numba,sklam/numba,stonebig/numba,IntelLabs/numba,gmarkall/numba,IntelLabs/numba,jriehl/numba,cpcloud/numba,gmarkall/numba,seibert/numba,jriehl/numba,sklam/numba,numba/numba,stuartarchibald/numba,sklam/numba,seibert/numba,numba/numba,stonebig/numba,sklam/numba,cpcloud/numba,cpcloud/numba,numba/numba,seibert/numba,gmarkall/numba,gmarkall/numba,stuartarchibald/numba,stonebig/numba,numba/numba,cpcloud/numba,stuartarchibald/numba,jriehl/numba,IntelLabs/numba,stuartarchibald/numba,cpcloud/numba,seibert/numba,sklam/numba