Fix #8860: [Win32] Crashlog window wasn't reliably shown for crashes not on the main thread.

src/os/macosx/crashlog_osx.cpp

@@ -257,3 +257,7 @@ void CDECL HandleCrash(int signum)
 		signal(*i, HandleCrash);
 	}
 }
+
+/* static */ void CrashLog::InitThread()
+{
+}