Fixing variance cal

src/dkohl/bayes/probability/distribution/Gaussian.java

@@ -33,6 +33,9 @@ public class Gaussian {
 	    var += Math.pow(sample - mean, 2);
 	}
 	var /= samples.size();
+	if(var == 0) {
+	    var = 1;
+	}
     }
     
     public double eval(Assignment assignment) {