Tiny fix: initialize TickSample::frames_count with 0.

I suggest that the lack of initialization causes issue 358 to happen. In Profiler::Disengage an empty TickSample is inserted in order to wake up the Profiler thread. Issue reporter claims that crash happens in LogTickEvent function. My guess is that frames_couint receives a wild value.

Review URL: http://codereview.chromium.org/113939


git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@2068 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/platform.h

@@ -493,7 +493,7 @@ class Socket {
 // TickSample captures the information collected for each sample.
 class TickSample {
  public:
-  TickSample() : pc(0), sp(0), fp(0), state(OTHER) {}
+  TickSample() : pc(0), sp(0), fp(0), state(OTHER), frames_count(0) {}
   uintptr_t pc;  // Instruction pointer.
   uintptr_t sp;  // Stack pointer.
   uintptr_t fp;  // Frame pointer.