AddResource(): use index instead of count

In AddResource(), parameter 'index' is not used.
It seems AddItem() use index instead of count.

Change-Id: I997ac96b7d32c5705606cdbf23c7fd71550c9aa6
Reviewed-on: https://review.haiku-os.org/630
Reviewed-by: Rene Gollent <[email protected]>

src/kits/storage/ResourcesContainer.cpp

@@ -44,7 +44,7 @@ ResourcesContainer::AddResource(ResourceItem *item, int32 index,
 		int32 count = CountResources();
 		if (index < 0 || index > count)
 			index = count;
-		result = fResources.AddItem(item, count);
+		result = fResources.AddItem(item, index);
 		SetModified(true);
 	}
 	return result;