audio, pipewire: fix signatures of pw_get_library_version and pw_init. Reference issue: https://github.com/libsdl-org/SDL/issues/5938
diff --git a/src/audio/pipewire/SDL_pipewire.c b/src/audio/pipewire/SDL_pipewire.c
index 6a32634..2e173ef 100644
--- a/src/audio/pipewire/SDL_pipewire.c
+++ b/src/audio/pipewire/SDL_pipewire.c
@@ -86,8 +86,8 @@ enum PW_READY_FLAGS
static SDL_bool pipewire_initialized = SDL_FALSE;
/* Pipewire entry points */
-static char *(*PIPEWIRE_pw_get_library_version)(void);
-static void (*PIPEWIRE_pw_init)(int *, char **);
+static const char *(*PIPEWIRE_pw_get_library_version)(void);
+static void (*PIPEWIRE_pw_init)(int *, char ***);
static void (*PIPEWIRE_pw_deinit)(void);
static struct pw_thread_loop *(*PIPEWIRE_pw_thread_loop_new)(const char *, const struct spa_dict *);
static void (*PIPEWIRE_pw_thread_loop_destroy)(struct pw_thread_loop *);