From db0d1e8f9e7f9f8985634d2071d1d448acda2689 Mon Sep 17 00:00:00 2001
From: Dave Hickin <david.hickin@diamond.ac.uk>
Date: Fri, 4 Sep 2015 00:33:06 +0100
Subject: [PATCH] Fix for NTHistogram::isCompatible()

Correct null pointer check - logic was inverted
---
 src/nt/nthistogram.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/nt/nthistogram.cpp b/src/nt/nthistogram.cpp
index 08ca949..301c04a 100644
--- a/src/nt/nthistogram.cpp
+++ b/src/nt/nthistogram.cpp
@@ -154,11 +154,11 @@ bool NTHistogram::isCompatible(StructureConstPtr const &structure)
     }
 
     field = structure->getField("alarm");
-    if (!field.get() && !ntField->isAlarm(field))
+    if (field.get() && !ntField->isAlarm(field))
         return false;
 
     field = structure->getField("timeStamp");
-    if (!field.get() && !ntField->isTimeStamp(field))
+    if (field.get() && !ntField->isTimeStamp(field))
         return false;
 
     return true;