From 3594e98aceab7e58f8ca5c5ba3f70a256289b20e Mon Sep 17 00:00:00 2001
From: Brent Pedersen <bpederse@gmail.com>
Date: Tue, 25 Nov 2014 14:40:39 -0700
Subject: [PATCH] prevent < 0 in n21
---
src/fisher/Fisher.cpp | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/src/fisher/Fisher.cpp b/src/fisher/Fisher.cpp
index 4cbfa7af..8b2aaf21 100644
--- a/src/fisher/Fisher.cpp
+++ b/src/fisher/Fisher.cpp
@@ -59,7 +59,7 @@ bool Fisher::calculate() {
long long n11 = (long)_overlapCounts;
// this could be < 0 because multiple overlaps
long long n12 = (long)max(0L, (long)_queryCounts - (long)_overlapCounts);
- long long n21 = (long)(_dbCounts - _overlapCounts);
+ long long n21 = max(0L, (long)(_dbCounts - _overlapCounts));
long long n22_full = n22_full_bases / bMean;
long long n22 = max(0L, (long)(n22_full - n12 - n21 - n11));
--
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