ZOOKEEPER-4989: Fix c client compilation on Windows with MSVC

Reviewers: kezhuw
Author: jmalopoy
Closes #2335 from jmalopoy/zookeeper-4989

(cherry picked from commit fb43500)
Signed-off-by: Kezhu Wang <[email protected]>

Author: jmalopoy

zookeeper-client/zookeeper-client-c/src/zookeeper.c

@@ -5113,7 +5113,11 @@ int zoo_add_auth(zhandle_t *zh,const char* scheme,const char* cert,
 
 static const char* format_endpoint_info(const struct sockaddr_storage* ep)
 {
+#if defined(_MSC_VER)
+    static __declspec(thread) char buf[134] = { 0 };
+#else
     static __thread char buf[134] = { 0 };
+#endif
     char addrstr[INET6_ADDRSTRLEN] = { 0 };
     const char *fmtstring;
     void *inaddr;