Shortcut(): clearer early out in SetShortcutRouting() -> CalcRoutingScore() path.

imgui.cpp

@@ -8294,13 +8294,16 @@ static int CalcRoutingScore(ImGuiWindow* location, ImGuiID owner_id, ImGuiInputF
         if (owner_id != 0 && g.ActiveId == owner_id)
             return 1;
 
+        // Early out when not in focus stack
+        if (focused == NULL || focused->RootWindow != location->RootWindow)
+            return 255;
+
         // Score based on distance to focused window (lower is better)
         // Assuming both windows are submitting a routing request,
         // - When Window....... is focused -> Window scores 3 (best), Window/ChildB scores 255 (no match)
         // - When Window/ChildB is focused -> Window scores 4,        Window/ChildB scores 3 (best)
         // Assuming only WindowA is submitting a routing request,
         // - When Window/ChildB is focused -> Window scores 4 (best), Window/ChildB doesn't have a score.
-        if (focused != NULL && focused->RootWindow == location->RootWindow)
         for (int next_score = 3; focused != NULL; next_score++)
         {
             if (focused == location)