vulkan: Deallocate memory after destroying buffer

Author: makaveli10

ggml/src/ggml-vulkan/ggml-vulkan.cpp

@@ -574,8 +574,8 @@ struct vk_buffer_struct {
         }
         VK_LOG_DEBUG("~vk_buffer_struct(" << buffer << ", " << size << ")");
 
-        device->device.freeMemory(device_memory);
         device->device.destroyBuffer(buffer);
+        device->device.freeMemory(device_memory);
     }
 };