Added testing function for ZString.

ZString.h

@@ -197,9 +197,11 @@ namespace coreutils {
       
       void setZString(ZString zstring);
 
+      size_t length;
+      
     private:
       char *data;
-      size_t length;
+//      size_t length;
       char *cursor;
       std::vector<ZString> list;