Merge pull request #1064 from cdavis5e/layered-copies

MVKCmdCopyImage: Use the method to copy multiple slices when possible.
diff --git a/MoltenVK/MoltenVK/Commands/MVKCmdTransfer.mm b/MoltenVK/MoltenVK/Commands/MVKCmdTransfer.mm
index 7be8d8c..60c62d0 100644
--- a/MoltenVK/MoltenVK/Commands/MVKCmdTransfer.mm
+++ b/MoltenVK/MoltenVK/Commands/MVKCmdTransfer.mm
@@ -1167,8 +1167,8 @@
 		VkRect2D renderArea = cmdEncoder->clipToRenderArea({{0, 0}, fbExtent});
 		fbExtent = {renderArea.offset.x + renderArea.extent.width, renderArea.offset.y + renderArea.extent.height};
 	}
-#endif
 	[tempRPDesc release];													// temp release
+#endif
 	populateVertices(cmdEncoder, vertices, fbExtent.width, fbExtent.height);
 
 	MVKPixelFormats* pixFmts = cmdEncoder->getPixelFormats();