bootmanager: Return value in impossible case

The setting is ranged, so this return statement is unreachable.
But GCC can't tell I guess.

1 files changed, 1 insertions, 0 deletions

diff --git a/src/yuzu/bootmanager.cpp b/src/yuzu/bootmanager.cpp
index 01dc51cff..1cf239496 100644
--- a/src/yuzu/bootmanager.cpp
+++ b/src/yuzu/bootmanager.cpp
@@ -163,6 +163,7 @@ public:
             case Settings::VSyncMode::Mailbox:
                 return 2;
             }
+            return 0;
         }();
 
         format.setSwapInterval(main_surface ? swap_interval : 0);