vkdebug: fix type compilation warning
Since VkMemoryHeapFlagBits is an enum, while VkMemoryHeapFlags is the expected alias of VkFlags.
This issue is spotted by warning of gcc 13.1.1
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Since VkMemoryHeapFlagBits is an enum, while VkMemoryHeapFlags is the expected alias of VkFlags.
This issue is spotted by warning of gcc 13.1.1