Simplified and fixed a bug in array_wraparray.
Simplified and fixed a bug in array_wraparray.

teoliphant/numpy-refactor,jasonmccampbell/numpy-refactor-sprint,teoliphant/numpy-refactor,teoliphant/numpy-refactor,jasonmccampbell/numpy-refactor-sprint,jasonmccampbell/numpy-refactor-sprint,jasonmccampbell/numpy-refactor-sprint,teoliphant/numpy-refactor,teoliphant/numpy-refactor