NPE in javadoc when no destdir is specified. PR 55949

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@1555019 13f79535-47bb-0310-9956-ffa450edef68

WHATSNEW

@@ -53,6 +53,9 @@ Fixed bugs:
    exception.
    Bugzilla Report 53964
 
+ * <javadoc> caused a NullPointerException when no destdir was set.
+   Bugzilla Report 55949
+
 Other changes:
 --------------
 

src/main/org/apache/tools/ant/taskdefs/Javadoc.java

@@ -2447,7 +2447,7 @@ public class Javadoc extends Task {
         if (!postProcessGeneratedJavadocs) {
             return;
         }
-        if (!destDir.isDirectory()) {
+        if (destDir != null && !destDir.isDirectory()) {
             log("No javadoc created, no need to post-process anything",
                 Project.MSG_VERBOSE);
             return;