Fix strict aliasing rule violations in dtoa.c.

src/platform-posix.cc

Index: src/platform-posix.cc
diff --git a/src/platform-posix.cc b/src/platform-posix.cc
index 89f4d983df0a0388f47937c1f607d0de2866d40d..613e8e4051f79ca80a7804340a5d023aa7f02653 100644
--- a/src/platform-posix.cc
+++ b/src/platform-posix.cc
@@ -238,7 +238,7 @@ bool POSIXSocket::Bind(const int port) {
   addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
   addr.sin_port = htons(port);
   int status = bind(socket_,
-                    reinterpret_cast<struct sockaddr *>(&addr),
+                    BitCast<struct sockaddr *>(&addr),
                     sizeof(addr));
   return status == 0;
 }