- Fixed issue with bounding box in shp/shx header when writing null shapefiles
- Fixed issue with bounding box in shp/shx header when writing null shapefiles

git-svn-id: f8e60ff998d72239c1081e8bd439defbd02fb3ec@13 6bd14dac-74e7-11de-ab85-01204adfcb19

lannymac/pyshp,djhenderson/pyshp,tarsh/pyshp,petabytekr/pyshp,tectronics/pyshp,micahcochran/pyshp,jzmiller1/pyshp-1,GeospatialPython/pyshp,jzmiller1/pyshp,rmgit/pyshp,CalebM1987/pyshp