Fix a bug where bigram search would never return

Bug: 4690487
Change-Id: Ie8f3f651508cc48bbb043a0b308f7e0d1524371c
diff --git a/native/src/dictionary.h b/native/src/dictionary.h
index 3b360d9..1b41f69 100644
--- a/native/src/dictionary.h
+++ b/native/src/dictionary.h
@@ -62,6 +62,9 @@
             const int pos, unsigned short *c, int *childrenPosition,
             bool *terminal, int *freq);
 
+    // TODO: delete this
+    int getBigramPosition(unsigned short *word, int length);
+
 private:
     bool hasBigram();