Bow to GCC harder.

src/conio/x_events.c

@@ -1913,7 +1913,8 @@ x11_event(XEvent *ev)
 								if (ch) {
 									// Bow to GCC
 									if (ch == 0xe0) // Double-up 0xe0
-										write(key_pipe[1], &ch, 1);
+										if (write(key_pipe[1], &ch, 1) == -1)
+											return;
 									if (write(key_pipe[1], &ch, 1) == EXIT_SUCCESS)
 										return;
 									else