From 4c1dfc62c8d59c7503d3635c96a4c1582f9d9e8a Mon Sep 17 00:00:00 2001
From: satok <satok@google.com>
Date: Thu, 17 Nov 2011 15:46:32 +0900
Subject: [PATCH] Fix a critical underflow in the touch calibration. This is a
 cherry-pick of Iacc746e1cc97bf3 Bug: 5629373 Change-Id:
 Ia198fe5e82b9e7fb801d9bae65cf9c6bbbd1befa

---
 native/src/correction.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/native/src/correction.cpp b/native/src/correction.cpp
index 31493ee7d..02aae9276 100644
--- a/native/src/correction.cpp
+++ b/native/src/correction.cpp
@@ -711,6 +711,9 @@ int Correction::RankingAlgorithm::calculateFinalFreq(const int inputIndex, const
                 //         \             .
                 // C        \            .
                 //   0   R1 R2
+                if (factor <= 0) {
+                    return -1;
+                }
                 multiplyRate((int)(factor * 100), &finalFreq);
             } else if (squaredDistance == PROXIMITY_CHAR_WITHOUT_DISTANCE_INFO) {
                 multiplyRate(WORDS_WITH_PROXIMITY_CHARACTER_DEMOTION_RATE, &finalFreq);