fix leak caused by nsLocalFile::Clone() where we were copying the refcnt to the new object - bug 124497

this ends up being more of a performance win than anyting on Unix and OS/2
r=mkaply, dbaron, sr=darin, a=asa

xpcom/io/nsLocalFileOS2.cpp

@@ -621,21 +621,18 @@ nsLocalFile::ResolveAndStat(PRBool resolveTerminal)
 NS_IMETHODIMP  
 nsLocalFile::Clone(nsIFile **file)
 {
-    nsresult rv;
-    char * aFilePath;
-    GetPath(&aFilePath);
-
-    nsCOMPtr<nsILocalFile> localFile;
-
-    rv = NS_NewLocalFile(aFilePath, mFollowSymlinks, getter_AddRefs(localFile));
-    nsMemory::Free(aFilePath);
+    *file = nsnull;
     
-    if (NS_SUCCEEDED(rv) && localFile)
-    {
-        return localFile->QueryInterface(NS_GET_IID(nsIFile), (void**)file);
-    }
+    nsLocalFile *localFile = new nsLocalFile(*this);
+    if (localFile == NULL)
+        return NS_ERROR_OUT_OF_MEMORY;
+
+    localFile->mRefCnt = 0;
+
+    *file = localFile;
+    NS_ADDREF(*file);
             
-    return rv;
+    return NS_OK;
 }
 
 NS_IMETHODIMP  

xpcom/io/nsLocalFileUnix.cpp

@@ -243,13 +243,11 @@ nsLocalFile::Clone(nsIFile **file)
     CHECK_mPath();
     NS_ENSURE_ARG(file);
 
-    nsCOMPtr<nsILocalFile> localFile = new nsLocalFile();
+    nsLocalFile *localFile = new nsLocalFile(*this);
     if (!localFile)
         return NS_ERROR_OUT_OF_MEMORY;
 
-    nsresult rv = localFile->InitWithPath(mPath);
-    if (NS_FAILED(rv))
-        return rv;
+    localFile->mRefCnt = 0;
 
     *file = localFile;
     NS_ADDREF(*file);