explicitly cast StringBuffer to Object so that the "right" append

method gets chosen.  This ensures that a JDK 1.4 compiled Ant can be
run on JDK 1.2.  Well, makes it more likely.

PR: 22705


git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@275142 13f79535-47bb-0310-9956-ffa450edef68

src/main/org/apache/tools/ant/types/Description.java

@@ -137,7 +137,7 @@ public class Description extends DataType {
             UnknownElement ue = ((UnknownElement) task);
             StringBuffer descComp = ue.getWrapper().getText();
             if (descComp != null) {
-                description.append(descComp);
+                description.append((Object) descComp);
             }
         }
     }