Fix releasing resources on command pool (?)

Author: deprilula28

src/nbl/video/CVulkanCommandBuffer.h

@@ -1398,6 +1398,8 @@ class CVulkanCommandBuffer : public IGPUCommandBuffer
 
         CVulkanCommandPool* vulkanCommandPool = IBackendObject::compatibility_cast<CVulkanCommandPool*>(m_cmdpool.get(), this);
         vulkanCommandPool->emplace_n(m_argListTail, begin, end);
+        // TODO: verify this
+        if (!m_argListHead) m_argListHead = m_argListTail;
 
         return true;
     }