If it is not a build exception best to get the full story

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@269490 13f79535-47bb-0310-9956-ffa450edef68

src/main/org/apache/tools/ant/DefaultLogger.java

@@ -138,7 +138,8 @@ public class DefaultLogger implements BuildLogger {
         else {
             err.println(lSep + "BUILD FAILED" + lSep);
 
-            if (Project.MSG_VERBOSE <= msgOutputLevel) {
+            if (Project.MSG_VERBOSE <= msgOutputLevel ||
+                !(err instanceof BuildException)) {
                 error.printStackTrace(err);
             }
             else {