removed warnings during normal build

build.xml

@@ -171,9 +171,10 @@
     <echo message="project.class.path: ${toString:project.class.path}" />
     <javac srcdir="${src}/" destdir="${build}"
            debug="true" debuglevel="lines,vars,source" includeantruntime="false"
-           source="${javacSource}" target="${javacTarget}" encoding="UTF-8">
+           source="${javacSource}" target="${javacTarget}" encoding="UTF-8"
+	   nowarn="on">
       <classpath refid="project.class.path" />
-      <compilerarg value="-Xlint"/>
+      <compilerarg value="-Xlint:unchecked"/>
     </javac>
 
     <!-- prepare classpath for MANIFEST (manifest cp is relative to jar) -->