cleans interfaces up

plugins/com.minres.scviewer.database.text/src/com/minres/scviewer/database/text/AbstractTxStream.java

@@ -143,6 +143,10 @@ abstract class AbstractTxStream extends HierNode implements IWaveform {
 		return rowCount;
 	}
 
+	@Override
+	public int getWidth() {
+		return 0;
+	}
 	/**
 	 * Calculate concurrency.
 	 */

plugins/com.minres.scviewer.database.text/src/com/minres/scviewer/database/text/TextDbLoader.java

@@ -222,7 +222,7 @@ public class TextDbLoader implements IWaveformDbLoader {
 	 */
 	@SuppressWarnings("unchecked")
 	@Override
-	public void load(IWaveformDb db, File file) throws InputFormatException {
+	public void load(File file) throws InputFormatException {
 		dispose();
 		FileType fType = getFileType(file);
 		if (file.length() < MEMMAP_LIMIT * (fType!=FileType.PLAIN ? 1 : 10)