output byte, instead of number if the request line contains invalid char

--- ../src/request.c~	2005-04-19 19:05:00.000000000 +0300
+++ ../src/request.c	2005-04-19 19:05:05.000000000 +0300
@@ -450,12 +450,15 @@
 				/* check uri for invalid characters */
 				for (j = 0; j < con->request.uri->used - 1; j++) {
 					if (!request_uri_is_valid_char(con->request.uri->ptr[j])) {
+						unsigned char buf[2];
+					    buf[0] = con->request.uri->ptr[j];
+						buf[1] = '\0';
+
 						con->http_status = 400;
 						con->keep_alive = 0;
 						
-						log_error_write(srv, __FILE__, __LINE__, "sd",
-								"invalid character in URI -> 400",
-								con->request.uri->ptr[j]);
+						log_error_write(srv, __FILE__, __LINE__, "sss",
+								"invalid character in URI", buf, "-> 400");
 						
 						if (srv->srvconf.log_request_header_on_error) {
 							log_error_write(srv, __FILE__, __LINE__, "Sb",