Trivial change to support filter field in VCF

git-svn-id: file:///humgen/gsa-scr1/gsa-engineering/svn_contents/trunk@2636 348d0f76-0448-11de-a6fe-93d51630548a

java/src/org/broadinstitute/sting/playground/gatk/walkers/varianteval/VariantDBCoverage.java

@@ -64,7 +64,7 @@ public class VariantDBCoverage extends BasicVariantAnalysis implements GenotypeA
 
         Variation dbsnp = null;
         for (ReferenceOrderedDatum d : dbsnpList) {
-            if (((Variation) d).isSNP()) {
+            if (((Variation) d).isSNP() && (! (d instanceof RodVCF) || ! ((RodVCF)d).isFiltered())) {
                 dbsnp = (Variation)d;
                 break;
             }