Preventing flooder from checking same node.

Added another flooder test.

src/test/java/ca/recrown/islandsurvivalcraft/floodfill/FloodFillTest.java

@@ -99,4 +99,19 @@ public class FloodFillTest {
             }
         }
     }
+
+    @Test
+    public void testFillMapBNonCorner() {
+        Flooder flooder = new Flooder(new Point2(43, 11), new Flood(mapB));
+        flooder.start();
+        for (int y = 0; y < mapB.length; y++) {
+            for (int x = 0; x < mapB[y].length; x++) {
+                if (x > 21 && y > 15 && x < 27) {
+                    assertTrue(mapB[y][x] > 0, String.format("At: %d, %d", x, y));
+                } else {
+                    assertEquals(0, mapB[y][x], String.format("At: %d, %d", x, y));
+                }
+            }
+        }
+    }
 }