Bug 153378 [Regression]Label text won't show up when the text key is not found
Steps to reproduce: 1.Add a label, set text to "aaa" 2.Add a resource file "a" to the report, add a text key "k1" which is not in the a.properties to the label 3.Preview in Web Viewer Expected result: Label display "aaa" when the text key is not found Actual result: Nothing in preview
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/util/ParameterValidationUtil.java
if ( number == null )
				return null;
			return new Integer( number.intValue( ) );
		}
		else if ( DesignChoiceConstants.PARAM_TYPE_BOOLEAN
				.equalsIgnoreCase( dataType ) )
		{
			return doValidateBoolean( value, locale );
		}
		else if ( DesignChoiceConstants.PARAM_TYPE_STRING
				.equalsIgnoreCase( dataType ) )
		{
			return value;
		}
		else
		{
			assert false;
			return null;
		}
	}
	/**
	 * Validates the input value at the given locale. The format is: short date
	 * and medium time.
	 * 
	 * @param value
	 *            the value to validate
	 * @param locale
	 *            the locale information
	 * @return the date value if validation is successful
	 * @throws ValidationValueException