Applies checkstyle to gwt-user source files.

Suggested by: bobv


git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@986 8db76d5a-ed1c-0410-87a9-c151d255dfc7
diff --git a/user/build.xml b/user/build.xml
index 385a525..95ef016 100755
--- a/user/build.xml
+++ b/user/build.xml
@@ -139,6 +139,7 @@
 
 	<target name="checkstyle" description="Static analysis of source">
 		<gwt.checkstyle>
+			<fileset dir="src" />
 			<fileset dir="super/com/google/gwt/emul" />
 			<fileset dir="super/com/google/gwt/junit/translatable" />
 		</gwt.checkstyle>