qrexec-daemon: fix pathological break-out-of-wait-loop

If the timeout is 1, attempting to retry would not actually retry,
since i would be incremented just after being reset to 0, and would
thus break out of the loop.

qrexec/qrexec-daemon.c

@@ -173,7 +173,7 @@ void init(int xid)
 			fprintf(stderr, ".");
 			if (i==startup_timeout-1) {
 				if (ask_on_connect_timeout(xid, startup_timeout))
-					i=0;
+					i=-1;
 			}
 		}
 		fprintf(stderr, "Cannot connect to qrexec agent for %d seconds, giving up\n", startup_timeout);