bugfix: ClassCastException it PicturesTable.getAllPictures():

UnknownEscherRecord cannot be cast to EscherBlipRecord


git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@931111 13f79535-47bb-0310-9956-ffa450edef68

src/scratchpad/src/org/apache/poi/hwpf/model/PicturesTable.java

@@ -168,9 +168,13 @@ public final class PicturesTable
                     {
                         // Blip stored in delay stream, which in a word doc, is the main stream
                         EscherRecordFactory recordFactory = new DefaultEscherRecordFactory();
-                        blip = (EscherBlipRecord) recordFactory.createRecord(_mainStream, bse.getOffset());
-                        blip.fillFields(_mainStream, bse.getOffset(), recordFactory);
-                        pictures.add(new Picture(blip.getPicturedata()));
+                        EscherRecord record = recordFactory.createRecord(_mainStream, bse.getOffset());
+
+                        if (record instanceof EscherBlipRecord) {
+                            record.fillFields(_mainStream, bse.getOffset(), recordFactory);
+                            blip = (EscherBlipRecord) record;
+                            pictures.add(new Picture(blip.getPicturedata()));
+                        }
                     }
                 }