msxml3: Use existing helpers for heap allocations.
diff --git a/dlls/msxml3/xmldoc.c b/dlls/msxml3/xmldoc.c
index b77fd00..d1a010f 100644
--- a/dlls/msxml3/xmldoc.c
+++ b/dlls/msxml3/xmldoc.c
@@ -117,7 +117,7 @@
     {
         xmlFreeDoc(This->xmldoc);
         if (This->stream) IStream_Release(This->stream);
-        HeapFree(GetProcessHeap(), 0, This);
+        heap_free(This);
     }
 
     return ref;
@@ -698,7 +698,7 @@
 
     TRACE("(%p,%p)\n", pUnkOuter, ppObj);
 
-    doc = HeapAlloc(GetProcessHeap(), 0, sizeof (*doc));
+    doc = heap_alloc(sizeof (*doc));
     if(!doc)
         return E_OUTOFMEMORY;