Use SFML 2.6's set of compiler warnings

Some minor tweaks were made to remove Android-specific workarounds
that CSFML doesn't need and removing a few warnings that are not
feasible to fix at the moment.

include/SFML/Graphics/Font.h

@@ -201,7 +201,7 @@ CSFML_GRAPHICS_API void sfFont_setSmooth(sfFont* font, sfBool smooth);
 /// \see setSmooth
 ///
 ////////////////////////////////////////////////////////////
-CSFML_GRAPHICS_API const sfBool sfFont_isSmooth(const sfFont* font);
+CSFML_GRAPHICS_API sfBool sfFont_isSmooth(const sfFont* font);
 
 ////////////////////////////////////////////////////////////
 /// \brief Get the font information

include/SFML/Window/Event.h

@@ -65,7 +65,7 @@ typedef enum
     sfEvtTouchEnded,             ///< A touch event ended (data in event.touch)
     sfEvtSensorChanged,          ///< A sensor value changed (data in event.sensor)
 
-    sfEvtCount,                  ///< Keep last -- the total number of event types
+    sfEvtCount                   ///< Keep last -- the total number of event types
 } sfEventType;