Avoid including sfx_manager.hpp inside kart properties header

src/audio/sfx_manager.hpp

@@ -98,7 +98,7 @@ public:
       *  Entries for custom SFX sounds.  These are unique for each kart.
       * eg. kart->playCustomSFX(SFX_MANAGER::CUSTOM_HORN)
       */
-    enum CustomSFX
+    enum CustomSFX : int
     {
         CUSTOM_HORN,    //!< Replaces default horn
         CUSTOM_CRASH,   //!< Played when colliding with another kart

src/graphics/camera_normal.cpp

@@ -19,6 +19,7 @@
 
 #include "graphics/camera_normal.hpp"
 
+#include "audio/sfx_manager.hpp"
 #include "config/stk_config.hpp"
 #include "config/user_config.hpp"
 #include "input/device_manager.hpp"

src/guiengine/widgets/player_kart_widget.cpp

@@ -18,6 +18,7 @@
 
 #include "guiengine/widgets/player_kart_widget.hpp"
 
+#include "audio/sfx_manager.hpp"
 #include "config/player_manager.hpp"
 #include "config/user_config.hpp"
 #include "graphics/render_info.hpp"

src/karts/explosion_animation.cpp

@@ -18,6 +18,7 @@
 
 #include "karts/explosion_animation.hpp"
 
+#include "audio/sfx_manager.hpp"
 #include "graphics/camera.hpp"
 #include "graphics/stars.hpp"
 #include "guiengine/engine.hpp"

src/karts/kart_properties.cpp

@@ -18,7 +18,9 @@
 
 #include "karts/kart_properties.hpp"
 
+#include "audio/sfx_manager.hpp"
 #include "addons/addon.hpp"
+#include "audio/sfx_manager.hpp"
 #include "config/stk_config.hpp"
 #include "config/player_manager.hpp"
 #include "graphics/central_settings.hpp"

src/karts/kart_properties.hpp

@@ -31,7 +31,6 @@ namespace irr
 }
 using namespace irr;
 
-#include "audio/sfx_manager.hpp"
 #include "io/xml_node.hpp"
 #include "race/race_manager.hpp"
 #include "utils/interpolation_array.hpp"
@@ -273,7 +272,7 @@ public:
 
     // ------------------------------------------------------------------------
     /** Returns custom sound effects for this kart. */
-    const int          getCustomSfxId (SFXManager::CustomSFX type)
+    const int          getCustomSfxId (int type)
                                        const  {return m_custom_sfx_id[type];  }
 
     // ------------------------------------------------------------------------