Fix SIGSEGV in /frm config on dedicated servers

[coredmp95]

Problem

/frm config <setting> <value> crashes a dedicated server with a SIGSEGV on any invocation (any setting, any value).

The command resolves the calling player's controller with:

AFGPlayerController* PlayerController = Cast<AFGPlayerController>(
    Sender->GetPlayer()->GetControlledCharacter()->GetLocalViewingPlayerController());
EPrivilegeLevel PrivilegeLevel = PlayerController->GetDSPrivilegeLevel();

On a dedicated server there is no local viewing player controller, so GetLocalViewingPlayerController() returns null, the Cast yields null, and GetDSPrivilegeLevel() (a FORCEINLINE member read) dereferences it → SIGSEGV: invalid attempt to read memory at address 0x...09d0.

Reproduction: run /frm config uWS.Port 8080 (or any key) from an admin client on a dedicated server → server crashes.

Fix

• UCommandSender::GetPlayer() already returns the sender's server-side AFGPlayerController, so use it directly instead of the GetControlledCharacter()->GetLocalViewingPlayerController() detour.
• Null-guard the controller: a null (console / non-player) sender is treated as trusted, and the privilege check short-circuits before GetNetMode() is ever called on a null pointer.
• Add the missing early return so a player without sufficient privileges no longer falls through and applies the setting anyway.

One file changed, no behavioral change for authorized listen-server/standalone/admin callers.

🤖 Generated with Claude Code