More cleanup.

src/alien.cpp

@@ -19,8 +19,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #include <math.h>
 
-#include "SDL.h"
-
 #include "defs.h"
 #include "structs.h"
 

src/audio.cpp

@@ -19,7 +19,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #include <math.h>
 
-#include "SDL.h"
 #include "SDL_mixer.h"
 
 #include "defs.h"

src/bullet.cpp

@@ -19,8 +19,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #include <math.h>
 
-#include "SDL.h"
-
 #include "defs.h"
 #include "structs.h"
 

src/collectable.cpp

@@ -17,11 +17,20 @@ You should have received a copy of the GNU General Public License
 along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
-#include "Starfighter.h"
+#include <math.h>
 
 #include "defs.h"
 #include "structs.h"
 
+#include "audio.h"
+#include "collectable.h"
+#include "engine.h"
+#include "explosion.h"
+#include "game.h"
+#include "gfx.h"
+#include "player.h"
+#include "weapons.h"
+
 /*
 Create a new collectable item based on supplied arguments.
 */

src/structs.h

@@ -20,6 +20,8 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #ifndef STRUCTS_H
 #define STRUCTS_H
 
+#include "SDL.h"
+
 typedef struct Object_ {
 
 	int active;