storage: fix typo in previous patch
storage: fix typo in previous patch

You'd think I'd learn to actually COMMIT my working tree
between testing that a last-minute fix compiles and pushing.

* src/storage/storage_backend_gluster.c
(virStorageBackendGlusterRefreshVol): Typo fix.

Signed-off-by: Eric Blake <a9da18479c871fe903d9590822cfe2629c6a4d11@redhat.com>

crobinso/libvirt,zhlcindy/libvirt-1.1.4-maintain,agx/libvirt,crobinso/libvirt,jfehlig/libvirt,eskultety/libvirt,zhlcindy/libvirt-1.1.4-maintain,zhlcindy/libvirt-1.1.4-maintain,jardasgit/libvirt,shugaoye/libvirt,andreabolognani/libvirt,libvirt/libvirt,VenkatDatta/libvirt,fabianfreyer/libvirt,VenkatDatta/libvirt,zippy2/libvirt,cbosdo/libvirt,elmarco/libvirt,elmarco/libvirt,libvirt/libvirt,zippy2/libvirt,zippy2/libvirt,taget/libvirt,jfehlig/libvirt,datto/libvirt,olafhering/libvirt,shugaoye/libvirt,VenkatDatta/libvirt,cbosdo/libvirt,datto/libvirt,datto/libvirt,datto/libvirt,zippy2/libvirt,jfehlig/libvirt,cbosdo/libvirt,shugaoye/libvirt,fabianfreyer/libvirt,andreabolognani/libvirt,olafhering/libvirt,crobinso/libvirt,nertpinx/libvirt,libvirt/libvirt,eskultety/libvirt,agx/libvirt,VenkatDatta/libvirt,rlaager/libvirt,jfehlig/libvirt,nertpinx/libvirt,olafhering/libvirt,fabianfreyer/libvirt,agx/libvirt,elmarco/libvirt,cbosdo/libvirt,jardasgit/libvirt,crobinso/libvirt,fabianfreyer/libvirt,shugaoye/libvirt,agx/libvirt,eskultety/libvirt,rlaager/libvirt,taget/libvirt,jardasgit/libvirt,zhlcindy/libvirt-1.1.4-maintain,shugaoye/libvirt,fabianfreyer/libvirt,eskultety/libvirt,agx/libvirt,elmarco/libvirt,cbosdo/libvirt,VenkatDatta/libvirt,zhlcindy/libvirt-1.1.4-maintain,jardasgit/libvirt,andreabolognani/libvirt,rlaager/libvirt,jardasgit/libvirt,taget/libvirt,andreabolognani/libvirt,rlaager/libvirt,andreabolognani/libvirt,nertpinx/libvirt,libvirt/libvirt,taget/libvirt,olafhering/libvirt,nertpinx/libvirt,datto/libvirt,rlaager/libvirt,eskultety/libvirt,taget/libvirt,elmarco/libvirt,nertpinx/libvirt