kernel/thread: Make bracing consistent within UpdatePriority()

src/core/hle/kernel/thread.cpp

@@ -306,12 +306,14 @@ void Thread::UpdatePriority() {
     // Find the highest priority among all the threads that are waiting for this thread's lock
     u32 new_priority = nominal_priority;
     if (!wait_mutex_threads.empty()) {
-        if (wait_mutex_threads.front()->current_priority < new_priority)
+        if (wait_mutex_threads.front()->current_priority < new_priority) {
             new_priority = wait_mutex_threads.front()->current_priority;
+        }
     }
 
-    if (new_priority == current_priority)
+    if (new_priority == current_priority) {
         return;
+    }
 
     scheduler->SetThreadPriority(this, new_priority);
     current_priority = new_priority;