remove trailing whitespace

(cherry picked from commit 4a4f247914)

core/os/thread.cpp

@@ -37,26 +37,26 @@ Error (*Thread::set_name_func)(const String&)=NULL;
 Thread::ID Thread::_main_thread_id=0;
 
 Thread::ID Thread::get_caller_ID() {
-	
+
 	if (get_thread_ID_func)
 		return get_thread_ID_func();
 	return 0;
 }
 
 Thread* Thread::create(ThreadCreateCallback p_callback,void * p_user,const Settings& p_settings) {
-	
+
 	if (create_func) {
-		 
+
 		return create_func(p_callback,p_user,p_settings);
 	}
 	return NULL;
 }
 
 void Thread::wait_to_finish(Thread *p_thread) {
-	
+
 	if (wait_to_finish_func)
 		wait_to_finish_func(p_thread);
-		
+
 }
 
 Error Thread::set_name(const String &p_name) {