Fix build

Change-Id: I799811aa3afb59bba2e4086a063f5da03669bba3
diff --git a/native/jni/src/unigram_dictionary.cpp b/native/jni/src/unigram_dictionary.cpp
index 3c826e9..eafc2e5 100644
--- a/native/jni/src/unigram_dictionary.cpp
+++ b/native/jni/src/unigram_dictionary.cpp
@@ -222,6 +222,7 @@
             short unsigned int* w = outWords + j * MAX_WORD_LENGTH;
             char s[MAX_WORD_LENGTH];
             for (int i = 0; i <= MAX_WORD_LENGTH; i++) s[i] = w[i];
+            (void)s;
             AKLOGI("%s %i", s, frequencies[j]);
         }
     }