Add basic error checking to create_directory in r_renderer_c::DoScreenshot
to prevent crash
#64
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Fixes PathOfBuildingCommunity/PathOfBuilding#7534
In some environments POB may not have the permissions to create a new folder. This causes the current call to create_directory to throw an exception, which is not handled, causing a crash. This commit implements a basic check for error code of create_directory with an appropriate log message.