build number:2.6.0.v20100506-0630

steps to reproduce:
1. insert a table,xtab,chart without any dataset or cube binding
2. check outline

expected result:
error icon before these items.

current behavior:
error icon for table,xtab, but no error for chart. but chart indeed has errors.
if the chart is nested in a table, it is not necessary to show error icon.
chart should handle its own validators.
the method "validate" on ireportitem and the method "getnodeicon" on inodeprovider should be implemented.
reassign to chart team.
improved validation of chart report item and check semantic error to display error icon.
verified in 2.6.0.v20100514-0630