more fixes:

- added walker for AST_ObjectProperty
- handle redefinitions properly (only mangle one symbol, make them all point
  to a single definition)

DynarchLIB seems to run fine after mangling + compressed output.

lib/output.js

@@ -707,8 +707,9 @@ function OutputStream(options) {
         var expr = self.expression;
         expr.print(output);
         if (expr instanceof AST_Number) {
-            if (!/[xa-f.]/i.test(output.last()))
+            if (!/[xa-f.]/i.test(output.last())) {
                 output.print(".");
+            }
         }
         output.print(".");
         output.print_name(self.property);
@@ -805,7 +806,11 @@ function OutputStream(options) {
         output.print_name(self.name);
     });
     DEFPRINT(AST_SymbolDeclaration, function(self, output){
-        output.print_name(self.mangled_name || self.name);
+        if (self.uniq) {
+            self.uniq.print(output);
+        } else {
+            output.print_name(self.mangled_name || self.name);
+        }
     });
     DEFPRINT(AST_SymbolRef, function(self, output){
         var def = self.symbol;