VDR: Fix use after free crash

[panos-lunarg]

Reserving space in the build_infos vector should fix a crash of referencing a dangling pointer when the infoCount was larger than 1.

[bradgrantham-lunarg]

Does this argue that build_infos should be an unordered_map on int that is checked with at before use?

[panos-lunarg]

Does this argue that build_infos should be an unordered_map on int that is checked with at before use?

unordered_map feels like an overkill as build_infos is just an array of things that is constructed once. There's no need to search in it, or add or remove objects after it is populated.
How about moving the call to reserve in the constructor? This should make it more robust