Merge pull request #1721 from c-rack/fix-issue-1720

Problem: build fails due to undefined INT_MAX

src/zmq.cpp

@@ -63,6 +63,7 @@ struct iovec {
 #include <string.h>
 #include <stdlib.h>
 #include <new>
+#include <climits>
 
 #include "proxy.hpp"
 #include "socket_base.hpp"

tests/test_large_msg.cpp

@@ -48,7 +48,6 @@ int main (void)
     
     zmq_msg_t msg, rcv;
     size_t big = 64 + (size_t) INT_MAX;
-    printf("Large msg: %u %llu %lu\n", INT_MAX, SIZE_MAX, big);
     
     rc = zmq_msg_init_size (&msg, big);
     assert (rc == 0);