Updated Xcode project for SDL_main as a header-only library

Xcode-iOS/Demos/src/accelerometer.c

@@ -187,8 +187,6 @@ main(int argc, char *argv[])
            SDL_JoystickNumAxes(accelerometer));
     printf("joystick number of hats = %d\n",
            SDL_JoystickNumHats(accelerometer));
-    printf("joystick number of balls = %d\n",
-           SDL_JoystickNumBalls(accelerometer));
     printf("joystick number of buttons = %d\n",
            SDL_JoystickNumButtons(accelerometer));
 

Xcode-iOS/Demos/src/fireworks.c

@@ -9,6 +9,7 @@
 #include <SDL3/SDL_opengles.h>
 #include "common.h"
 #include <math.h>
+#include <stdlib.h>
 #include <time.h>
 
 #define ACCEL 0.0001f           /* acceleration due to gravity, units in pixels per millesecond squared */

Xcode-iOS/Demos/src/rectangles.c

@@ -6,6 +6,7 @@
 
 #include <SDL3/SDL.h>
 #include <SDL3/SDL_main.h>
+#include <stdlib.h>
 #include <time.h>
 #include "common.h"