```enumerateInstanceExtensionPropertiesToVector``` redundant assert

```enumerateInstanceExtensionPropertiesToVector``` can be usefull to check whether openXR libraries are installed on user's PC. Like this:
```
!xr::enumerateInstanceExtensionPropertiesToVector(nullptr).empty();
```
But the assert inside ruins this solution and the same logic, so an option using more lines of code is commonly used:
```
uint32_t property_count = 0;
auto result = xr::enumerateInstanceExtensionProperties(nullptr, 0, &property_count, nullptr);
return XR_SUCCEEDED(result) && property_count != 0;
```
The suggestion is to remove redundant assert

Locate enumerateInstanceExtensionPropertiesToVector and inspect the assertion that prevents checking whether OpenXR libraries are installed through an empty-result query. Compare its behavior with enumerateInstanceExtensionProperties and verify that the vector helper no longer asserts for this use case; the issue is done when the suggested check can be used without the redundant assertion.

Written by the indexing model from the issue text.