test id for text update

[NicoDupont]

Hi,

It may be good to add same verification on the id for text update.

//CHANGING TEXT CONTENT based on svgElementID

						var item = svgDoc.getElementById(resultSet[i][(_.first(_.where(metadata, {"colName": "svgElementID"}))).colIndex]);
                        
						if (item) {
							text = svgDoc.getElementById(resultSet[i][(_.first(_.where(metadata, {"colName": "svgElementID"}))).colIndex]);
							text.textContent = resultSet[i][(_.first(_.where(metadata, {"colName": "value"}))).colIndex];
						} else {
                           Logger.log("### ID " + resultSet[i][(_.first(_.where(metadata, {"colName": "svgElementID"}))).colIndex] + " WAS NOT FOUND ON SVG STRUTURE ###");
                        }