Use the new way of getting the priority value

ctru-rs/src/thread.rs

@@ -27,7 +27,13 @@ use ctru_sys::svcGetProcessorID;
 /// Get the current thread's priority level. Lower values correspond to higher
 /// priority levels. The main thread's priority is typically 0x30, but not always.
 pub fn priority() -> i32 {
-    unsafe { libc::pthread_getpriority() }
+    let thread_id = unsafe { libc::pthread_self() };
+    let mut policy = 0;
+    let mut sched_param = libc::sched_param { sched_priority: 0 };
+
+    unsafe { libc::pthread_getschedparam(thread_id, &mut policy, &mut sched_param) };
+
+    sched_param.sched_priority
 }
 
 /// Returns the ID of the processor the current thread is running on.