The parameter to SDL_AppEvent() should be non-const

This allows functions like SDL_ConvertEventToRenderCoordinates() to work without having to copy the event.

Fixes https://github.com/libsdl-org/SDL/issues/10691

test/loopwave.c

@@ -120,7 +120,7 @@ SDL_AppResult SDL_AppInit(void **appstate, int argc, char *argv[])
     return SDL_APP_CONTINUE;
 }
 
-SDL_AppResult SDL_AppEvent(void *appstate, const SDL_Event *event)
+SDL_AppResult SDL_AppEvent(void *appstate, SDL_Event *event)
 {
     return (event->type == SDL_EVENT_QUIT) ? SDL_APP_SUCCESS : SDL_APP_CONTINUE;
 }

test/testaudio.c

@@ -1114,7 +1114,7 @@ SDL_AppResult SDL_AppInit(void **appstate, int argc, char *argv[])
 
 static SDL_bool saw_event = SDL_FALSE;
 
-SDL_AppResult SDL_AppEvent(void *appstate, const SDL_Event *event)
+SDL_AppResult SDL_AppEvent(void *appstate, SDL_Event *event)
 {
     Thing *thing = NULL;
 

test/testaudiorecording.c

@@ -149,7 +149,7 @@ SDL_AppResult SDL_AppInit(void **appstate, int argc, char **argv)
     return SDL_APP_CONTINUE;
 }
 
-SDL_AppResult SDL_AppEvent(void *appstate, const SDL_Event *event)
+SDL_AppResult SDL_AppEvent(void *appstate, SDL_Event *event)
 {
     if (event->type == SDL_EVENT_QUIT) {
         return SDL_APP_SUCCESS;

test/testcamera.c

@@ -216,7 +216,7 @@ static int FlipCamera(void)
     return SDL_APP_CONTINUE;
 }
 
-SDL_AppResult SDL_AppEvent(void *appstate, const SDL_Event *event)
+SDL_AppResult SDL_AppEvent(void *appstate, SDL_Event *event)
 {
     switch (event->type) {
         case SDL_EVENT_KEY_DOWN: {

test/testdropfile.c

@@ -70,7 +70,7 @@ onerror:
     return SDL_APP_FAILURE;
 }
 
-SDL_AppResult SDL_AppEvent(void *appstate, const SDL_Event *event)
+SDL_AppResult SDL_AppEvent(void *appstate, SDL_Event *event)
 {
     dropfile_dialog *dialog = appstate;
     if (event->type == SDL_EVENT_DROP_BEGIN) {

test/testgpu_simple_clear.c

@@ -70,7 +70,7 @@ SDL_AppResult SDL_AppInit(void **appstate, int argc, char *argv[])
     return SDL_APP_CONTINUE;
 }
 
-SDL_AppResult SDL_AppEvent(void *appstate, const SDL_Event *event)
+SDL_AppResult SDL_AppEvent(void *appstate, SDL_Event *event)
 {
     return SDLTest_CommonEventMainCallbacks(state, event);
 }

test/testpen.c

@@ -107,7 +107,7 @@ static Pen *FindPen(SDL_PenID which)
     return NULL;
 }
 
-SDL_AppResult SDL_AppEvent(void *appstate, const SDL_Event *event)
+SDL_AppResult SDL_AppEvent(void *appstate, SDL_Event *event)
 {
     Pen *pen = NULL;
 

test/testsprite.c

@@ -551,7 +551,7 @@ SDL_AppResult SDL_AppInit(void **appstate, int argc, char *argv[])
 }
 
 
-SDL_AppResult SDL_AppEvent(void *appstate, const SDL_Event *event)
+SDL_AppResult SDL_AppEvent(void *appstate, SDL_Event *event)
 {
     return SDLTest_CommonEventMainCallbacks(state, event);
 }