Only adjust cursor positions with curses locked.

cgminer.c

@@ -2186,6 +2186,7 @@ static void check_winsizes(void)
 
 static void switch_compact(void)
 {
+	if (curses_active_locked()) {
 		if (opt_compact) {
 			logstart = devcursor + 1;
 			logcursor = logstart + 1;
@@ -2193,6 +2194,8 @@ static void switch_compact(void)
 			logstart = devcursor + total_devices + 1;
 			logcursor = logstart + 1;
 		}
+		unlock_curses();
+	}
 	check_winsizes();
 }