Cleaned up handling of presence/absence of autogenerated files, so no…

… more warnings

git-svn-id: https://cdk.svn.sourceforge.net/svnroot/cdk/trunk/cdk@9330 eb4e18e3-b210-0410-a6ab-dec725e4b171

build.xml

@@ -344,12 +344,18 @@
             </javac>
 
         	<!-- create a autogenerated.classes file, if applicable, so that these files can be included in the jar -->
-        	<copy file="${metainf}/${module}.autogenerated" tofile="${build}/${module}.autogenerated.classes"
-        	      failonerror="false"/>
-        	<replace dir="${build}" token=".java" value="*.class">
-        	  <include name="*.autogenerated.classes"/>
-        	</replace>
-
+            <if>
+                <istrue value="${module.autogenerated.present}"/>
+                <then>
+                    <copy file="${metainf}/${module}.autogenerated" tofile="${build}/${module}.autogenerated.classes"
+                          failonerror="false"/>
+                    <replace dir="${build}" token=".java" value="*.class">
+                        <include name="*.autogenerated.classes"/>
+                    </replace>
+                </then>
+            </if>
+
+
             <!-- and then jar things up into the module jar -->
             <jar jarfile="${dist}/jar/cdk-${module}.jar">
                 <fileset dir="${build}">