Added a default ErrorListener just to be on the safe side.

git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/branches/Temp_AreaTreeNewDesign@689039 13f79535-47bb-0310-9956-ffa450edef68

test/java/org/apache/fop/visual/AbstractPSPDFBitmapProducer.java

 import org.apache.fop.apps.FOUserAgent;
 import org.apache.fop.apps.Fop;
 import org.apache.fop.apps.FopFactory;
+import org.apache.fop.util.DefaultErrorListener;
 
 /**
  * BitmapProducer implementation that uses the PS or PDF renderer and an external converter
                     SAXResult res = new SAXResult(fop.getDefaultHandler());
 
                     Transformer transformer = getTransformer(context);
+                    transformer.setErrorListener(new DefaultErrorListener(log));
                     transformer.transform(new StreamSource(src), res);
                 } finally {
                     IOUtils.closeQuietly(out);

test/java/org/apache/fop/visual/BitmapProducerJava2D.java

 import org.apache.fop.apps.Fop;
 import org.apache.fop.apps.FopFactory;
 import org.apache.fop.apps.MimeConstants;
+import org.apache.fop.util.DefaultErrorListener;
 
 /**
  * BitmapProducer implementation that uses the Java2DRenderer to create bitmaps.
                 SAXResult res = new SAXResult(fop.getDefaultHandler());
 
                 Transformer transformer = getTransformer(context);
+                transformer.setErrorListener(new DefaultErrorListener(log));
                 transformer.transform(new StreamSource(src), res);
             } finally {
                 IOUtils.closeQuietly(out);