fix check of return value

[Robert Klein]

Hi,

on lib/libc/uuid/uuid_to_string.c the return value for asprintf is
checked for -1 while the manpage only says "For all these functions if
an output or encoding error occurs, a value less than 0 is returned."

The patch below adjusts to code to the man page (checking for less than
zero).

Best regards
Robert


Index: uuid_to_string.c
===================================================================
RCS file: /cvs/src/lib/libc/uuid/uuid_to_string.c,v
retrieving revision 1.2
diff -u -p -r1.2 uuid_to_string.c
--- uuid_to_string.c    10 Sep 2015 18:13:46 -0000      1.2
+++ uuid_to_string.c    3 Sep 2020 12:40:41 -0000
@@ -64,6 +64,6 @@ uuid_to_string(const uuid_t *u, char **s
            u->clock_seq_hi_and_reserved, u->clock_seq_low, u->node[0],
            u->node[1], u->node[2], u->node[3], u->node[4], u->node[5]);
 
-       if (c == -1 && status != NULL)
+       if (c < 0 && status != NULL)
                *status = uuid_s_no_memory;
 }