Removed SDL_bool in favor of plain bool

We require stdbool.h in the build environment, so we might as well use the plain bool type.

If your environment doesn't have stdbool.h, this simple replacement will suffice:
typedef signed char bool;

src/camera/SDL_camera.c

@@ -650,7 +650,7 @@ void SDL_CloseCamera(SDL_Camera *camera)
     ClosePhysicalCamera(device);
 }
 
-SDL_bool SDL_GetCameraFormat(SDL_Camera *camera, SDL_CameraSpec *spec)
+bool SDL_GetCameraFormat(SDL_Camera *camera, SDL_CameraSpec *spec)
 {
     bool result;
 
@@ -1407,7 +1407,7 @@ static void NukeCameraHashItem(const void *key, const void *value, void *data)
     // no-op, keys and values in this hashtable are treated as Plain Old Data and don't get freed here.
 }
 
-SDL_bool SDL_CameraInit(const char *driver_name)
+bool SDL_CameraInit(const char *driver_name)
 {
     if (SDL_GetCurrentCameraDriver()) {
         SDL_QuitCamera(); // shutdown driver if already running.

src/camera/SDL_camera_c.h

@@ -24,7 +24,7 @@
 #define SDL_camera_c_h_
 
 // Initialize the camera subsystem
-extern SDL_bool SDL_CameraInit(const char *driver_name);
+extern bool SDL_CameraInit(const char *driver_name);
 
 // Shutdown the camera subsystem
 extern void SDL_QuitCamera(void);

src/camera/android/SDL_camera_android.c

@@ -516,7 +516,7 @@ static bool PrepareCamera(SDL_Camera *device)
     return true;
 }
 
-static void SDLCALL CameraPermissionCallback(void *userdata, const char *permission, SDL_bool granted)
+static void SDLCALL CameraPermissionCallback(void *userdata, const char *permission, bool granted)
 {
     SDL_Camera *device = (SDL_Camera *) userdata;
     if (device->hidden != NULL) {   // if device was already closed, don't send an event.