File fix-gcc15.patch of Package voxelands

diff --git a/src/thread.c b/src/thread.c
index bb8d8cc..cd645fa 100644
--- a/src/thread.c
+++ b/src/thread.c
@@ -65,12 +65,12 @@ int thread_is_main()
 }
 
 /* create a new thread */
-thread_t *thread_create(void *(*func)(), array_t *args)
+thread_t *thread_create(void *(*func)(thread_t *), array_t *args)
 {
 	thread_t *t = malloc(sizeof(thread_t));
 
 	t->state = IO_THREAD_RUNNING;
-	t->func = func;
+	t->func = (void * (*)(void *))func;
 	t->args = args;
 	t->exit = 0;
 
diff --git a/src/thread.h b/src/thread.h
index a38bb2e..64d4a77 100644
--- a/src/thread.h
+++ b/src/thread.h
@@ -36,7 +36,7 @@ typedef struct thread_s {
 #endif
 	unsigned int state;
 	int exit;
-	void *(*func)();
+	void *(*func)(void *);
 	array_t *args;
 } thread_t;
 #endif
@@ -61,7 +61,7 @@ typedef struct mutex_s {
 int thread_init(void);
 int thread_equal(threadid_t t1, threadid_t t2);
 int thread_is_main(void);
-thread_t *thread_create(void *(*func)(), array_t *args);
+thread_t *thread_create(void *(*func)(thread_t *), array_t *args);
 void thread_free(thread_t *t);
 void thread_exit(thread_t *t, int state);
 void thread_stop(thread_t *t);