bug-13751: Update vkCmdClearColorImage color parameter

svn ID: 30918
Change the VkCmdClearColroImage color parameter
be a pointer.
diff --git a/demos/cube.c b/demos/cube.c
index 58a265f..8dc7ac3 100644
--- a/demos/cube.c
+++ b/demos/cube.c
@@ -526,7 +526,7 @@
     vkCmdClearColorImage(cmd_buf,
             demo->buffers[demo->current_buffer].image,
             VK_IMAGE_LAYOUT_CLEAR_OPTIMAL,
-            clear_color, 1, &clear_range);
+            &clear_color, 1, &clear_range);
 
     clear_range.aspect = VK_IMAGE_ASPECT_DEPTH;
     vkCmdClearDepthStencil(cmd_buf, demo->depth.image,