Fixed a rogue error message.

git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@393 8db76d5a-ed1c-0410-87a9-c151d255dfc7
diff --git a/dev/core/src/com/google/gwt/dev/jjs/ast/JVisitor.java b/dev/core/src/com/google/gwt/dev/jjs/ast/JVisitor.java
index 89f9782..0fec523 100644
--- a/dev/core/src/com/google/gwt/dev/jjs/ast/JVisitor.java
+++ b/dev/core/src/com/google/gwt/dev/jjs/ast/JVisitor.java
@@ -528,7 +528,7 @@
     if (e instanceof InternalCompilerException) {
       ice = (InternalCompilerException) e;
     } else {
-      ice = new InternalCompilerException("Error constructing Java AST", e);
+      ice = new InternalCompilerException("Unexpected error during visit.", e);
     }
     ice.addNode(node);
     return ice;