BUG: Restore the environment variables when import multiarray fails.
BUG: Restore the environment variables when import multiarray fails.

The environment variables are modified before importing multiarray
and restored when the import is done.  But when the import fails
the environment varibles were left changed.

grlee77/numpy,tynn/numpy,WarrenWeckesser/numpy,tynn/numpy,pdebuyl/numpy,jorisvandenbossche/numpy,abalkin/numpy,rgommers/numpy,jakirkham/numpy,anntzer/numpy,shoyer/numpy,madphysicist/numpy,jorisvandenbossche/numpy,grlee77/numpy,rgommers/numpy,Eric89GXL/numpy,anntzer/numpy,jorisvandenbossche/numpy,numpy/numpy,charris/numpy,charris/numpy,simongibbons/numpy,rgommers/numpy,ahaldane/numpy,simongibbons/numpy,grlee77/numpy,numpy/numpy,ahaldane/numpy,rgommers/numpy,jakirkham/numpy,shoyer/numpy,pizzathief/numpy,MSeifert04/numpy,seberg/numpy,grlee77/numpy,seberg/numpy,mhvk/numpy,endolith/numpy,endolith/numpy,charris/numpy,endolith/numpy,mattip/numpy,shoyer/numpy,pizzathief/numpy,MSeifert04/numpy,mhvk/numpy,numpy/numpy,gfyoung/numpy,Eric89GXL/numpy,tynn/numpy,simongibbons/numpy,pdebuyl/numpy,mattip/numpy,simongibbons/numpy,MSeifert04/numpy,pdebuyl/numpy,Eric89GXL/numpy,seberg/numpy,charris/numpy,pbrod/numpy,madphysicist/numpy,gfyoung/numpy,Eric89GXL/numpy,pizzathief/numpy,WarrenWeckesser/numpy,ahaldane/numpy,WarrenWeckesser/numpy,madphysicist/numpy,ahaldane/numpy,anntzer/numpy,madphysicist/numpy,grlee77/numpy,shoyer/numpy,pbrod/numpy,pbrod/numpy,shoyer/numpy,jorisvandenbossche/numpy,abalkin/numpy,pbrod/numpy,pbrod/numpy,pdebuyl/numpy,jakirkham/numpy,abalkin/numpy,seberg/numpy,numpy/numpy,mhvk/numpy,endolith/numpy,ahaldane/numpy,pizzathief/numpy,jakirkham/numpy,mattip/numpy,mattip/numpy,jorisvandenbossche/numpy,mhvk/numpy,anntzer/numpy,simongibbons/numpy,pizzathief/numpy,jakirkham/numpy,gfyoung/numpy,WarrenWeckesser/numpy,mhvk/numpy,WarrenWeckesser/numpy,madphysicist/numpy,MSeifert04/numpy,MSeifert04/numpy