Map cache is not written on non-Windows builds

[bobtista]

Prerequisites

• I have searched for similar issues and confirmed this is not a duplicate

Game Version

• Command & Conquer Generals
• Command & Conquer Generals: Zero Hour

Bug Description

On non-Windows builds a map added to the user maps directory is parsed again on every launch and never reaches the cache.

Reproduction Steps

1. Add a custom map to the user maps directory on a non-Windows build.
2. Start the game, let the map cache pick it up, then quit.
3. Observe MapCache.ini is unchanged and a file named Maps\MapCache.ini was created alongside it.
4. Start again and observe the same map is parsed from scratch a second time.

Additional Context

The cache path is assembled with a hardcoded Windows separator before the file name is appended.