Merge branch 'master-djtrig-fpe' into 'master'

ATR-24805: Fix FPE in Displaced Jet Trigger Displaced Hypo tool

See merge request atlas/athena!49870

Trigger/TrigHypothesis/TrigLongLivedParticlesHypo/src/DisplacedJetDispHypoTool.cxx

@@ -74,8 +74,11 @@ StatusCode DisplacedJetDispHypoTool::decide(  Info& info )  const {
 			nother += 1;
 		}
 	}
-
-	double nother_frac = nother*1.0/(nother + ndisp + nprompt);
+	double nother_frac = 0.0;
+	//ensure divide by zero does not occur
+	if((nother + ndisp + nprompt) > 0){
+		nother_frac = nother*1.0/(nother + ndisp + nprompt);
+	}
 
 	unsigned int jet_class = 0;