Given the min and max parameter ZipfianGenerator should not return 0 if (uz <...

Given the min and max parameter ZipfianGenerator  should not return 0 if (uz < 1) nor 1 if (uz<1.0+Math.pow(0.5,theta)). Instead it should return the min value (base) or min + 1.

core/src/main/java/com/yahoo/ycsb/generator/ZipfianGenerator.java

@@ -276,12 +276,12 @@ public class ZipfianGenerator extends IntegerGenerator
 
 		if (uz<1.0)
 		{
-			return 0;
+			return base;
 		}
 
 		if (uz<1.0+Math.pow(0.5,theta)) 
 		{
-			return 1;
+			return base + 1;
 		}
 
 		long ret=base+(long)((itemcount) * Math.pow(eta*u - eta + 1, alpha));

core/src/test/java/com/yahoo/ycsb/generator/TestZipfianGenerator.java

+package com.yahoo.ycsb.generator;
+
+import org.testng.annotations.Test;
+import static org.testng.AssertJUnit.assertTrue;
+
+public class TestZipfianGenerator {
+    @Test
+    public void testMinParameter() {
+        long min = 5;
+        long max = 100;
+        Boolean gr_max = true;
+
+        ZipfianGenerator zipfian = new ZipfianGenerator(min, max);
+
+        for (int i = 0; i < 1000; i++) {
+            long rnd = zipfian.nextLong();
+            // System.out.println(rnd);
+            if(rnd < min) gr_max = false;
+        }
+
+        assertTrue(gr_max);
+    }
+}