[Fix] (Espryt): query buffer age only after a damage region is declared

MobileGL/MG_Backend/DirectVulkan/BackendObject_DirectVulkan.cpp

@@ -585,7 +585,10 @@ namespace MobileGL::MG_Backend::DirectVulkan {
 #endif
     }
 
-    Int32 BackendObject_DirectVulkan::QueryCurrentBufferAge() {
+    // A swapchain image keeps its content through a present whatever region is drawn next: the
+    // damage region the client may declare is not needed here.
+    Int32 BackendObject_DirectVulkan::QueryCurrentBufferAge(Bool damageRegionFollows) {
+        (void)damageRegionFollows;
         const std::lock_guard<std::recursive_mutex> lock(m_eglStateMutex);
         return pVulkanRenderer ? pVulkanRenderer->CurrentDrawBufferAge() : 0;
     }