Bugfix for FisherStrand

-- FisherStrand pValues can sum to slightly greater than 1.0, so they need to be capped to convert to a Phred-scaled quality score

protected/java/src/org/broadinstitute/sting/gatk/walkers/annotator/FisherStrand.java

@@ -176,7 +176,8 @@ public class FisherStrand extends InfoFieldAnnotation implements StandardAnnotat
         //System.out.printf("P-cutoff: %f\n", pCutoff);
         //System.out.printf("P-value: %f\n\n", pValue);
 
-       return pValue;
+        // min is necessary as numerical precision can result in pValue being slightly greater than 1.0
+        return Math.min(pValue, 1.0);
     }
 
     private static int [][] copyContingencyTable(int [][] t) {