Fixed mergesort errors.
Fixed mergesort errors.

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