ignore warnings when compiling

h2/build.xml

@@ -14,7 +14,7 @@
 	</target>
 
 	<target name="compile" depends="switchSourceAuto, resources, download">
-		<javac destdir="bin" debug="true" debuglevel="lines,source" >
+		<javac destdir="bin" nowarn="true" debug="true" debuglevel="lines,source" >
 			<classpath location="ext/servlet-api-2.4.jar" />
 		    <classpath location="ext/lucene-core-2.2.0.jar" />
 		    <classpath location="ext/slf4j-api-1.5.0.jar" />
@@ -108,7 +108,7 @@
 	</target>
 
 	<target name="switchSourcePrepare" depends="clean">
-		<javac srcdir="src/tools" destdir="bin" debug="true" debuglevel="lines,source" includes="org/h2/build/code/SwitchSource.java"/>
+		<javac srcdir="src/tools" destdir="bin" debug="true" nowarn="true" debuglevel="lines,source" includes="org/h2/build/code/SwitchSource.java"/>
 	</target>
 
     <target name="switchSourceAndroid" depends="switchSourcePrepare">