Bug 140620 Chart scripting errors are ignored
Write a chart with an invalid script, the execution simply ignores the script. This makes it difficult to debug scripting. The error message is also not precise and needs improvements.
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/script/ScriptHandler.java
{
			javahandler.afterDrawDataPointLabel( (DataPointHints) tmpArgs[0],
					(Label) tmpArgs[1],
					(IChartScriptContext) tmpArgs[2] );
		}
		else if ( ScriptHandler.BEFORE_DRAW_FITTING_CURVE.equals( name ) )
		{
			javahandler.beforeDrawFittingCurve( (CurveFitting) tmpArgs[0],
					(IChartScriptContext) tmpArgs[1] );
		}
		else if ( ScriptHandler.AFTER_DRAW_FITTING_CURVE.equals( name ) )
		{
			javahandler.afterDrawFittingCurve( (CurveFitting) tmpArgs[0],
					(IChartScriptContext) tmpArgs[1] );
		}
		else if ( ScriptHandler.BEFORE_DRAW_AXIS_LABEL.equals( name ) )
		{
			javahandler.beforeDrawAxisLabel( (Axis) tmpArgs[0],
					(Label) tmpArgs[1],
					(IChartScriptContext) tmpArgs[2] );
		}
		else if ( ScriptHandler.AFTER_DRAW_AXIS_LABEL.equals( name ) )
		{
			javahandler.afterDrawAxisLabel( (Axis) tmpArgs[0],
					(Label) tmpArgs[1],
					(IChartScriptContext) tmpArgs[2] );
		}
		else if ( ScriptHandler.BEFORE_DRAW_AXIS_TITLE.equals( name ) )
		{
			javahandler.beforeDrawAxisTitle( (Axis) tmpArgs[0],