no bug fixup for windows not liking ssize_t on a CLOSED TREE

accessible/ipc/ProxyAccessible.cpp

@@ -903,7 +903,7 @@ ProxyAccessible::TakeFocus()
   unused << mDoc->SendTakeFocus(mID);
 }
 
-ssize_t
+int32_t
 ProxyAccessible::IndexOfEmbeddedChild(const ProxyAccessible* aChild)
 {
   uint64_t childID = aChild->mID;

accessible/ipc/ProxyAccessible.h

@@ -47,7 +47,7 @@ public:
 
   // XXX evaluate if this is fast enough.
   size_t IndexInParent() const { return mParent->mChildren.IndexOf(this); }
-  ssize_t IndexOfEmbeddedChild(const ProxyAccessible*);
+  int32_t IndexOfEmbeddedChild(const ProxyAccessible*);
   bool MustPruneChildren() const;
 
   void Shutdown();