Fix check for empty hostname.

As reported by Arthur Zakirov, Gcc 7.1 complained about this with
-Wpointer-compare.

Discussion: https://www.postgresql.org/message-id/CAKNkYnybV_NFVacGbW=VspzAo3TwRJFNi+9iBob66YqQMZopwg@mail.gmail.com

diff --git a/src/interfaces/libpq/fe-connect.c b/src/interfaces/libpq/fe-connect.c
index e548f3f06216659383654bb81256a7ae14eaaa3d..5a964bf0b57296da19c7281557a532c11ed17345 100644 (file)
--- a/src/interfaces/libpq/fe-connect.c
+++ b/src/interfaces/libpq/fe-connect.c
@@ -965,8 +965,8 @@ connectOptions2(PGconn *conn)
        {
            conn->status = CONNECTION_BAD;
            printfPQExpBuffer(&conn->errorMessage,
-           libpq_gettext("could not match %d host names to %d hostaddrs\n"),
-                count_comma_separated_elems(conn->pghost), conn->nconnhost);
+                             libpq_gettext("could not match %d host names to %d hostaddrs\n"),
+                             count_comma_separated_elems(conn->pghost), conn->nconnhost);
            return false;
        }
    }
@@ -1097,7 +1097,7 @@ connectOptions2(PGconn *conn)
            char       *pwhost = conn->connhost[i].host;
 
            if (conn->connhost[i].type == CHT_HOST_ADDRESS &&
-           conn->connhost[i].host != NULL && conn->connhost[i].host != '\0')
+               conn->connhost[i].host != NULL && conn->connhost[i].host[0] != '\0')
                pwhost = conn->connhost[i].hostaddr;
 
            conn->connhost[i].password =