Fix Utils.getStackTrace()

Change-Id: Iaf160af32bb77b3ad5929cb5ee8eccd01165bdf6
diff --git a/java/src/com/android/inputmethod/latin/Utils.java b/java/src/com/android/inputmethod/latin/Utils.java
index 8f71de0..0bf4a8b 100644
--- a/java/src/com/android/inputmethod/latin/Utils.java
+++ b/java/src/com/android/inputmethod/latin/Utils.java
@@ -220,7 +220,7 @@
     }
 
     public static String getStackTrace() {
-        return getStackTrace(Integer.MAX_VALUE);
+        return getStackTrace(Integer.MAX_VALUE - 1);
     }
 
     public static class UsabilityStudyLogUtils {