use unsigned, not signed

diff --git a/src/lib/print.c b/src/lib/print.c
index 5e3a353536ca11dc68b88a839283109bdbc8b0b9..0bf128d2f3fda973ae6220756e1a9be3076ebfa5 100644 (file)
--- a/src/lib/print.c
+++ b/src/lib/print.c
@@ -583,7 +583,7 @@ size_t vp_prints_value_json(char *out, size_t outlen, VALUE_PAIR const *vp)
                                        freespace--;
                                        break;
                                default:
-                                       len = snprintf(out, freespace, "u%04X", *q);
+                                       len = snprintf(out, freespace, "u%04X", (uint32_t) *q);
                                        if (is_truncated(len, freespace)) return (outlen - freespace) + len;
                                        out += len;
                                        freespace -= len;