0MQ guide bug: missing functions in zhelpers.h about zguide

[dlintw]

zhelpers.h exist bug, here is the compiler warning

92 // Dump the message as text or binary
93 char *data = zmq_msg_data (&message);
94 int size = zmq_msg_size (&message);
95 int is_text = 1;
96 int char_nbr;
97 for (char_nbr = 0; char_nbr < size; char_nbr++)
98 if (data [char_nbr] < 32 || data [char_nbr] > 127)
99 is_text = 0;

Line 98: warning: comparison is always false due to limited range of data type

[hintjens]

Done, thanks.