Adjust occlusionquery according to Vulkan spec.

This moves vkCmdCopyQueryPoolResults outside of the Renderpass, as it
should be according to the Vulkan spec. This understanably has looks
wrong on the first frame, but by doing this you avoid having to use two
renderpasses to get the occlusion result.

occlusionquery/occlusionquery.cpp

@@ -261,17 +261,6 @@ public:
 
 			vkCmdEndQuery(drawCmdBuffers[i], queryPool, 1);
 
-			// Query results
-			vkCmdCopyQueryPoolResults(
-				drawCmdBuffers[i], 
-				queryPool,
-				0,
-				2,
-				queryResult.buffer,
-				0,
-				sizeof(uint64_t),
-				VK_QUERY_RESULT_64_BIT | VK_QUERY_RESULT_WAIT_BIT);
-
 			// Visible pass
 			// Clear color and depth attachments
 			VkClearAttachment clearAttachments[2] = {};
@@ -318,6 +307,17 @@ public:
 
 			vkCmdEndRenderPass(drawCmdBuffers[i]);
 
+			// Query results
+			vkCmdCopyQueryPoolResults(
+				drawCmdBuffers[i], 
+				queryPool,
+				0,
+				2,
+				queryResult.buffer,
+				0,
+				sizeof(uint64_t),
+				VK_QUERY_RESULT_64_BIT | VK_QUERY_RESULT_WAIT_BIT);
+
 			err = vkEndCommandBuffer(drawCmdBuffers[i]);
 			assert(!err);
 		}