Fix cpplint whitespace/parens issues

Change-Id: Ifc678d59a8bed24ffddde5a0e543620b17b0aba9
diff --git a/runtime/thread.h b/runtime/thread.h
index 64ff7c2..5c9e8c3 100644
--- a/runtime/thread.h
+++ b/runtime/thread.h
@@ -104,7 +104,7 @@
   static Thread* Current() {
     // We rely on Thread::Current returning NULL for a detached thread, so it's not obvious
     // that we can replace this with a direct %fs access on x86.
-    if(!is_started_) {
+    if (!is_started_) {
       return NULL;
     } else {
       void* thread = pthread_getspecific(Thread::pthread_key_self_);