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
* @param locale
	 *            the locale information
	 * @return the double value if the validation is successful
	 * @throws ValidationValueException
	 *             if the value to validate is invalid
	 */
	static private Number doValidateNumberByPattern( String dataType,
			String format, String value, ULocale locale )
			throws ValidationValueException
	{
		assert DesignChoiceConstants.PARAM_TYPE_FLOAT
				.equalsIgnoreCase( dataType )
				|| DesignChoiceConstants.PARAM_TYPE_DECIMAL
						.equalsIgnoreCase( dataType )
				|| DesignChoiceConstants.PARAM_TYPE_INTEGER
						.equalsIgnoreCase( dataType );
		if ( DesignChoiceConstants.NUMBER_FORMAT_TYPE_UNFORMATTED
				.equalsIgnoreCase( format ) )
			return doValidateNumber( dataType, value, locale );
		assert !StringUtil.isBlank( format );
		if ( StringUtil.isBlank( value ) )
			return null;
		NumberFormatter formatter = new NumberFormatter( locale );
		formatter.applyPattern( format );
		try
		{
			return formatter.parse( value );
		}
		catch ( ParseException e )
		{