[birt-dev] Checkin: Bugzilla#194785 - Stacked bars are drawn incompletel

["Yulin Wang" <yulin.wang@xxxxxxxxxxx>]

- Summary:
Stacked bars are drawn incompletely when window is minimized

- Bugzilla Bug (s) Resolved: 194785

- Description:
Check in #194785
Caused by not resetting some properties after rendering finished.
This issue only exists in chart examples, because once window is refreshed, example code won't call generator.build() to recompute the chart, but only use the previous properties to render.
Fixed by resetting last stacked position after series rendering finished.

- Tests Description: Manual Test

- Notes to Build Team: N/A

- Notes to Developers: N/A

- Notes to QA: N/A

- Notes to Documentation: N/A

- Files Edited:

/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/computation/withaxes/AxisSubUnit.java

- Files Added:

- Files Deleted