fixed a bug that the compiler reports an error when "length" is used as a class or package name.

git-svn-id: http://anonsvn.jboss.org/repos/javassist/trunk@583 30ef5769-5b8d-40dd-aea6-55b5d6557bb3

.classpath

@@ -2,7 +2,7 @@
 <classpath>
 	<classpathentry excluding="javassist/util/HotSwapper.java" kind="src" path="src/main"/>
 	<classpathentry kind="src" path="src/test"/>
-	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER"/>
 	<classpathentry kind="lib" path="lib/junit.jar"/>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER"/>
 	<classpathentry kind="output" path="eclipse-output/classes"/>
 </classpath>

src/main/javassist/compiler/TypeChecker.java

@@ -564,7 +564,13 @@ public class TypeChecker extends Visitor implements Opcode, TokenId {
         if (token == '.') {
             String member = ((Symbol)expr.oprand2()).get();
             if (member.equals("length"))
-                atArrayLength(expr);
+                try {
+                    atArrayLength(expr);
+                }
+                catch (NoFieldException nfe) {
+                    // length might be a class or package name.
+                    atFieldRead(expr);
+                }
             else if (member.equals("class"))                
                 atClassObject(expr);  // .class
             else