javac source seems to be needed, too, when compiling under JDK 5.

git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/trunk@232785 13f79535-47bb-0310-9956-ffa450edef68

build.xml

@@ -157,6 +157,7 @@ list of possible build targets.
   <property name="debug" value="on"/>
   <property name="optimize" value="off"/>
   <property name="deprecation" value="on"/>
+  <property name="javac.source" value="1.3"/>
   <property name="javac.target" value="1.3"/>
     
   <property name="javadoc.packages" value="org.apache.fop.*"/>
@@ -352,7 +353,7 @@ list of possible build targets.
     <!-- create directories -->
     <mkdir dir="${build.classes.dir}"/>
     <javac destdir="${build.classes.dir}" debug="${debug}" deprecation="${deprecation}"
-           optimize="${optimize}" target="${javac.target}">
+           optimize="${optimize}" source="${javac.source}" target="${javac.target}">
       <src path="${build.gensrc.dir}"/>
       <src path="${src.java.dir}"/>
       <src refid="graphics-configuration-adapter"/>