Bug 140538 Can't save by auto when it is preview after create the 2nd parameter
Details: Can't save by auto when it is preview after create the 2nd parameter Step: 1.New a report design. 2.Create the 1st parameter and preview. 3.Create the 2nd parameter and preview. Actual result: After step 2, it is ok. After step 3, if I have not press save button, it will not save by auto.
UI/org.eclipse.birt.report.designer.ui.preview/src/org/eclipse/birt/report/designer/ui/preview/editors/ReportPreviewFormPage.java
continue;
					}
					String paramValue = null;
					if (params != null
							&& params.containsKey(parameter.getName())) {
						Object curVal = params.get(parameter.getName());
						if (curVal != null)
							paramValue = curVal.toString();
					} else {
						paramValue = parameter.getDefaultValue();
					}
					if (paramValue == null && !parameter.allowNull()) {
						missingParameter = true;
						break;
					}
					if (paramValue != null
							&& paramValue.trim().length() <= 0
							&& !parameter.allowBlank()
							&& parameter.getDataType().equalsIgnoreCase(
									DesignChoiceConstants.PARAM_TYPE_STRING)) {
						missingParameter = true;
						break;
					}
				}
			}
		}
		return missingParameter;
	}
}