sdl: Don't release input on mouse mode change in full-screen mode

While in full-screen mode, the input focus naturally belongs to the SDL window. Avoid dropping it when switching from absolute to relative mouse mode.

Signed-off-by Jan Kiszka<[email protected]>

---
  ui/sdl.c |    4 +++-
  1 files changed, 3 insertions(+), 1 deletions(-)

ui/sdl.c +3 -1

index 385cc91..c7aaedf 100644
@@ -491,7 +491,9 @@ static void sdl_mouse_mode_change(Notifier *notify, void *data)
              absolute_enabled = 1;
          }
      } else if (absolute_enabled) {
-        sdl_grab_end();
+        if (!gui_fullscreen) {
+            sdl_grab_end();
+        }
          absolute_enabled = 0;
      }
  }