Bug 141255 No error for the incompatible parameter value
Steps to reproduce: 1.New a decimal parameter, set the default value to "aaa" 2.Preview the report by "Preview" tab Expected result: Error to say the incompatible parameter value Actual result: Parameter request page keeps poping up till input the decimal value Note: if preview in Web Viewer, error will be thrown out, but no exception description.
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/context/ViewerAttributeBean.java
ConfigVariableHandle configVar = (ConfigVariableHandle) configVars
							.next( );
					if ( configVar != null && configVar.getName( ) != null )
					{
						
						String paramName = getParameterName( configVar
								.getName( ) );
						Object paramValue = configVar.getValue( );
						while ( paramIr != null && paramName != null
								&& paramValue != null && paramIr.hasNext( ) )
						{
							ParameterDefinition parameterObj = (ParameterDefinition) paramIr
									.next( );
							if ( paramName.equals( parameterObj.getName( ) ) )
							{
								ReportParameterConverter converter = new ReportParameterConverter(
										parameterObj.getPattern( ), ULocale.US );
								paramValue = converter.parse( paramValue
										.toString( ), parameterObj
										.getDataType( ) );
								break;
							}
						}
						if ( paramName != null && paramName.length( ) > 0
								&& paramValue != null )
						{
							this.configMap.put( paramName, paramValue );
						}
					}
				}