client: Clear pending interrupt on stdin EOF

The client can send an interrupt cookie after the EOF cookie.
Harmless, as the server throws away input after the EOF cookie.  Clean
it up anyway.

Signed-off-by: Markus Armbruster <armbru@pond.sub.org>

src/client/play.c

@@ -543,6 +543,7 @@ play(int sock)
 		    eof_fd0 = 1;
 		    sa.sa_handler = SIG_DFL;
 		    sigaction(SIGINT, &sa, NULL);
+		    send_intr = 0;
 		}
 	    } else
 		partial_line_sent = ring_peek(&inbuf, -1) != '\n';