When decorating the preedit string, stop forcing the cursor past the end of the input

src/IBusChewingEngine.gob

Index: src/IBusChewingEngine.gob
diff --git a/src/IBusChewingEngine.gob b/src/IBusChewingEngine.gob
index 8b7981404734bd0d61fcdb2fc971c7f3d9b6b7cc..35c2c78cc5ae8656787a7809121b360c934bf7db 100644
--- a/src/IBusChewingEngine.gob
+++ b/src/IBusChewingEngine.gob
@@ -509,7 +509,7 @@ class IBus:Chewing:Engine from IBus:Engine{
 	    case CHEWING_INPUT_MODE_EDITING:
 	    case CHEWING_INPUT_MODE_SELECTING_DONE:
 	    default: /* BYPASS */
-		cursorRight=*chiSymbolCursor + MAX(zhuyin_item_written, 1);
+		cursorRight=*chiSymbolCursor + zhuyin_item_written;
 		break;
 	}