Fixed a comment typo.

--HG--
extra : rebase_source : 1fa59a26a2119f196ec2ac739f41f4b3fe22fbbe
diff --git a/include/SDL_sensor.h b/include/SDL_sensor.h
index e517570..7f566e1 100644
--- a/include/SDL_sensor.h
+++ b/include/SDL_sensor.h
@@ -61,7 +61,7 @@
 
 /* The different sensors defined by SDL
  *
- * Additional sensors may be available, using platform dependent semanticsx
+ * Additional sensors may be available, using platform dependent semantics.
  *
  * Hare are the additional Android sensors:
  * https://developer.android.com/reference/android/hardware/SensorEvent.html#values