Problem: build fails on VS2010 as it does not have snprintf

Solution: ifdef it

src/ctx.cpp

@@ -425,11 +425,15 @@ void zmq::thread_ctx_t::start_thread (thread_t &thread_,
     thread_.setSchedulingParameters (_thread_priority, _thread_sched_policy,
                                      _thread_affinity_cpus);
 
-    char namebuf[16];
+    char namebuf[16] = "";
+#ifdef ZMQ_HAVE_WINDOWS
+    LIBZMQ_UNUSED (name_);
+#else
     snprintf (namebuf, sizeof (namebuf), "%s%sZMQbg%s%s",
               _thread_name_prefix.empty () ? "" : _thread_name_prefix.c_str (),
               _thread_name_prefix.empty () ? "" : "/", name_ ? "/" : "",
               name_ ? name_ : "");
+#endif
     thread_.start (tfn_, arg_, namebuf);
 }
 

src/io_thread.cpp

@@ -56,9 +56,11 @@ zmq::io_thread_t::~io_thread_t ()
 
 void zmq::io_thread_t::start ()
 {
-    char name[16];
+    char name[16] = "";
+#ifndef ZMQ_HAVE_WINDOWS
     snprintf (name, sizeof (name), "IO/%u",
               get_tid () - zmq::ctx_t::reaper_tid - 1);
+#endif
     //  Start the underlying I/O thread.
     _poller->start (name);
 }