crash prevention when colframes return bogus colindices bug 240854 r/sr=bzbarsky git-svn-id: svn://10.0.0.236/trunk@155080 18797224-902f-48f8-a5cc-f745e15eee43
crash prevention when colframes return bogus colindices bug 240854 r/sr=bzbarsky git-svn-id: svn://10.0.0.236/trunk@155080 18797224-902f-48f8-a5cc-f745e15eee43