Refs #8385 Add static cast to variable in LoadFlexiNexusTest

Code/Mantid/Framework/SINQ/test/LoadFlexiNexusTest.h

@@ -44,7 +44,7 @@ public:
 		IMDHistoWorkspace_sptr data =  
 		  AnalysisDataService::Instance().retrieveWS<IMDHistoWorkspace>(
 			outputSpace);
-		long nBin = data->getNPoints();
+		long nBin = static_cast<long>(data->getNPoints());
 		long sum = 0;
 		double *sdata = data->getSignalArray();
 		for(long i = 0; i < nBin; i++){