Fixed multi-threadig problem


git-svn-id: http://casacore.googlecode.com/svn/trunk@21319 6afa274c-0927-0410-9b47-a1284d797885
Improved previous fix


git-svn-id: http://casacore.googlecode.com/svn/trunk@21320 6afa274c-0927-0410-9b47-a1284d797885
Fixed errors found by valgrind when running tComponentList


git-svn-id: http://casacore.googlecode.com/svn/trunk@21325 6afa274c-0927-0410-9b47-a1284d797885
Fixed problem found by Kumar. tempClose now temporarily unmarks for delete if
the table is marked for delete.


git-svn-id: http://casacore.googlecode.com/svn/trunk@21326 6afa274c-0927-0410-9b47-a1284d797885