Bug 189100 [Regression]X-axis data column issue[0001]
Description: [Regression]X-axis data column issue[0001] Step: 1.New a sample datasource and dataset from OFFICES 2.New a chart and use the dataset 3.Change the data type of OFFICECODE from string to integer. 4.Drop the column of OFFICECODE to Value(Y)Series. Actual result: Show the error message: Unable to use a text data to render a numerical/datetime axis.
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/executor/transform/pass/PassManager.java
{
		private Object[] exprs;
		private Object[] names;
		private boolean[] isValueAvailable;
		
		/**
		 * 
		 * @param exprs
		 * @param names
		 * @throws DataException 
		 */
		DummyICCState( Map columnMappings ) throws DataException
		{
			this.exprs = columnMappings.values( ).toArray( );
			this.names = columnMappings.keySet( ).toArray( );
			this.isValueAvailable= new boolean[exprs.length];