Add test for (-1+0i)**(1/2)
Add test for (-1+0i)**(1/2)

git-svn-id: 53605643c415f7495558be95614cf14171f1db78@25491 c213334d-75ef-0310-aa23-eaa082d1ae64

b2gills/roast,zostay/roast,laben/roast,cygx/roast,dankogai/roast,dankogai/roast,b2gills/roast,zostay/roast,skids/roast,dankogai/roast,perl6/roast,cygx/roast,bitrauser/roast,skids/roast,dogbert17/roast,skids/roast,bitrauser/roast,laben/roast,niner/roast,zostay/roast,cygx/roast,niner/roast,dogbert17/roast,laben/roast,niner/roast,b2gills/roast