Bug 151794 Integer data can't be retrieved in dynamic parameter
Steps to reproduce: 1.New a sample data source and a data set from table "CUSTOMERS" 2.New a dynamic parameter, choose data type "Integer" Expected result: Those integer data set columns are listed in "Select value column" Actual result: No column available
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/dialogs/ParameterDialog.java
if ( canBeNull( ) )
		{
			if ( value == null || value.length( ) == 0 )
			{
				return null;
			}
		}
		else
		{
			if ( value == null || value.length( ) == 0 )
			{
				return ERROR_MSG_CANNOT_BE_NULL;
			}
		}
		if ( canBeBlank( ) )
		{
			if ( StringUtil.isBlank( value ) )
			{
				return null;
			}
		}
		else
		{
			if ( StringUtil.isBlank( value ) )
			{
				return ERROR_MSG_CANNOT_BE_BLANK;
			}
		}
		try
		{