Issue #557 private namespaces fix (nullpointer)

trunk/src/com/jpexs/decompiler/flash/abc/avm2/AVM2Deobfuscation.java

@@ -85,6 +85,9 @@ public class AVM2Deobfuscation {
     }
 
     public String builtInNs(String ns) {
+        if(ns == null){
+            return null;
+        }
         if (ns.equals("http://www.adobe.com/2006/actionscript/flash/proxy")) {
             return "flash.utils.flash_proxy";
         }

trunk/src/com/jpexs/decompiler/flash/gui/Main.java

@@ -893,7 +893,7 @@ public class Main {
      * @param args the command line arguments
      * @throws IOException
      */
-    public static void main(String[] args) throws IOException {                
+    public static void main(String[] args) throws IOException {  
         startFreeMemThread();
         initLogging(Configuration.debugMode.get());
         initLang();