Fix memory leaks from changeset dcda49ff1a26 - need to make sure that

the destructor gets called for the hashtable entries.

Also fixes a nit (AddRef() -> NS_ADDREF_THIS())

r+sr=bz

modules/libpr0n/src/imgLoader.cpp

@@ -183,7 +183,7 @@ nsProgressNotificationProxy::GetInterface(const nsIID& iid,
                                           void** result) {
   if (iid.Equals(NS_GET_IID(nsIProgressEventSink))) {
     *result = static_cast<nsIProgressEventSink*>(this);
-    AddRef();
+    NS_ADDREF_THIS();
     return NS_OK;
   }
   if (mOriginalCallbacks)

uriloader/base/nsDocLoader.cpp

@@ -126,6 +126,12 @@ RequestInfoHashInitEntry(PLDHashTable *table, PLDHashEntryHdr *entry,
   return PR_TRUE;
 }
 
+static void
+RequestInfoHashClearEntry(PLDHashTable *table, PLDHashEntryHdr *entry)
+{
+  nsRequestInfo* info = static_cast<nsRequestInfo *>(entry);
+  info->~nsRequestInfo();
+}
 
 struct nsListenerInfo {
   nsListenerInfo(nsIWeakReference *aListener, unsigned long aNotifyMask) 
@@ -162,7 +168,7 @@ nsDocLoader::nsDocLoader()
     PL_DHashVoidPtrKeyStub,
     PL_DHashMatchEntryStub,
     PL_DHashMoveEntryStub,
-    PL_DHashClearEntryStub,
+    RequestInfoHashClearEntry,
     PL_DHashFinalizeStub,
     RequestInfoHashInitEntry
   };