Fix a minor 3.0-specific edge case wrt #177

Author: cowtowncoder

avro/src/main/java/com/fasterxml/jackson/dataformat/avro/deser/AvroStructureReader.java

@@ -30,8 +30,6 @@ protected AvroStructureReader(AvroReadContext parent, int type, String typeId) {
      *<p>
      * Note: Arrays can not return {@code true} as they need to encode length
      * even for "empty" arrays.
-     *
-     * @since 2.10
      */
     public boolean consumesNoContent() {
         return false;

avro/src/main/java/com/fasterxml/jackson/dataformat/avro/deser/RecordReader.java

@@ -164,6 +164,8 @@ public String nextFieldName() throws IOException
                     return name;
                 }
                 _nextAtEndObject();
+            } else if (_state == STATE_END) {
+                _nextAtEndObject();
             } else {
                 nextToken();
             }
@@ -182,6 +184,10 @@ public int nextFieldName(FieldNameMatcher matcher) throws IOException {
                 }
                 return _matchAtEndObject();
             }
+            if (_state == STATE_END) {
+                return _matchAtEndObject();
+            }
+            // 26-Aug-2019, tatu: Is this correct thing to do?
             nextToken();
             return FieldNameMatcher.MATCH_ODD_TOKEN;
         }