* never delete self on Release(), CLZMA is not a real COM class

* safer destructor


git-svn-id: https://svn.code.sf.net/p/nsis/code/NSIS/trunk@4557 212acab6-be3b-0410-9dea-997c60f758d6

Source/clzma.cpp

@@ -133,15 +133,23 @@ CLZMA::CLZMA(): _encoder(NULL)
   hCompressionThread = 0;
   SetNextOut(NULL, 0);
   SetNextIn(NULL, 0);
+
+  AddRef(); // will be manually deleted, not released
 }
 
 CLZMA::~CLZMA()
 {
   End();
   if (hNeedIOEvent)
+  {
     CloseHandle(hNeedIOEvent);
+    hNeedIOEvent = NULL;
+  }
   if (hIOReadyEvent)
+  {
     CloseHandle(hIOReadyEvent);
+    hIOReadyEvent = NULL;
+  }
   if (_encoder)
   {
     delete _encoder;