Use word id to construct DicNode instead of isTerminal flag.

Bug: 14425059
Change-Id: I8484d34756bd76668ece34211e7366a4758d7bf5
diff --git a/native/jni/src/defines.h b/native/jni/src/defines.h
index 24d04e5..57e1888 100644
--- a/native/jni/src/defines.h
+++ b/native/jni/src/defines.h
@@ -299,6 +299,7 @@
 #define NOT_AN_INDEX (-1)
 #define NOT_A_PROBABILITY (-1)
 #define NOT_A_DICT_POS (S_INT_MIN)
+#define NOT_A_WORD_ID (S_INT_MIN)
 #define NOT_A_TIMESTAMP (-1)
 #define NOT_A_LANGUAGE_WEIGHT (-1.0f)