Don't automatically free temporary memory, let the application call SDL_FreeTemporaryMemory() when it's ready.

Also mark up all functions that return temporary memory with SDL_DECLSPEC_TEMP, to help people implementing language bindings.

Fixes https://github.com/libsdl-org/SDL/issues/10378

include/SDL3/SDL_locale.h

@@ -89,9 +89,6 @@ typedef struct SDL_Locale
  * if possible, and you can call this function again to get an updated copy of
  * preferred locales.
  *
- * This returns temporary memory which will be automatically freed later, and
- * can be claimed with SDL_ClaimTemporaryMemory().
- *
  * \param count a pointer filled in with the number of locales returned, may
  *              be NULL.
  * \returns a NULL terminated array of locale pointers, or NULL on failure;
@@ -99,7 +96,7 @@ typedef struct SDL_Locale
  *
  * \since This function is available since SDL 3.0.0.
  */
-extern SDL_DECLSPEC const SDL_Locale * const * SDLCALL SDL_GetPreferredLocales(int *count);
+extern SDL_DECLSPEC_TEMP const SDL_Locale * const * SDLCALL SDL_GetPreferredLocales(int *count);
 
 /* Ends C function definitions when using C++ */
 #ifdef __cplusplus