SDL: Actually make the sensors magical!

SDL Commits
1 
From d9f09e77f27fade35965bccb2f3389832f25d4cc Mon Sep 17 00:00:00 2001
From: Sam Lantinga <[EMAIL REDACTED]>
Date: Tue, 8 Aug 2023 22:34:24 -0700
Subject: [PATCH] Actually make the sensors magical!

---
 src/sensor/SDL_sensor.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/sensor/SDL_sensor.c b/src/sensor/SDL_sensor.c
index 20d13c931515..26eed8984fc9 100644
--- a/src/sensor/SDL_sensor.c
+++ b/src/sensor/SDL_sensor.c
@@ -344,6 +344,7 @@ SDL_Sensor *SDL_OpenSensor(SDL_SensorID instance_id)
         SDL_UnlockSensors();
         return NULL;
     }
+    sensor->magic = &SDL_sensor_magic;
     sensor->driver = driver;
     sensor->instance_id = instance_id;
     sensor->type = driver->GetDeviceType(device_index);