fixed bug related to issue 8. POINTZ (11) type records have four fields: X, Y, Z, and M
fixed bug related to issue 8. POINTZ (11) type records have four fields: X, Y, Z, and M

git-svn-id: f8e60ff998d72239c1081e8bd439defbd02fb3ec@28 6bd14dac-74e7-11de-ab85-01204adfcb19

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