Bring that Whole New World to the Old Continent too

Applies the clang-format style to the 2.1 branch as done for master in
5dbf1809c6.

core/os/thread_safe.cpp

@@ -42,5 +42,5 @@ ThreadSafe::ThreadSafe() {
 ThreadSafe::~ThreadSafe() {
 
 	if (mutex)
-		memdelete( mutex );
+		memdelete(mutex);
 }