Fixed bug where pUserData was not being assigned during initialization.

Signed-off-by: Nils Petter Skålerud <np_skalerud@hotmail.com>

src/vk_mem_alloc.h

diff --git a/src/vk_mem_alloc.h b/src/vk_mem_alloc.h
index fd85476..44c75bd 100644
--- a/src/vk_mem_alloc.h
+++ b/src/vk_mem_alloc.h
@@ -15060,6 +15060,7 @@
 

     if(pCreateInfo->pDeviceMemoryCallbacks != VMA_NULL)

     {

+        m_DeviceMemoryCallbacks.pUserData = pCreateInfo->pDeviceMemoryCallbacks->pUserData;

         m_DeviceMemoryCallbacks.pfnAllocate = pCreateInfo->pDeviceMemoryCallbacks->pfnAllocate;

         m_DeviceMemoryCallbacks.pfnFree = pCreateInfo->pDeviceMemoryCallbacks->pfnFree;

     }