* Properly handle ENOMEM error return in MapMemory
Needed for Assassin's Creed Unity to behave properly.
* Change error message
If I left the message as-is, we'd probably see inexperienced people claiming the assert means your device needs more memory, which is completely false.
* Clang
You know you're doing something right when Clang complains.
* Attempt to handle MemoryMapFlags::NoOverwrite
Based on my interpretation of red_prig's descriptions. These changes are untested, as I'm not able to test right now.
* Fix flag description
* Move overwrite check to while condition
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