fix mac build after 16548

TBR=bmeurer@chromium.org,yurys@chromium.org
BUG=

Review URL: https://codereview.chromium.org/23452023

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16550 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/cpu-profiler.cc

@@ -142,7 +142,7 @@ void ProfilerEventsProcessor::Run() {
 
   // Process remaining tick events.
   do {
-    while (!ProcessOneSample());
+    while (!ProcessOneSample()) {}
   } while (ProcessCodeEvent());
 }