Changed /descend to be a little more accurate, to not drop players from a high distance, and to not drop players into the void.

src/WorldEditPlayer.java

@@ -204,14 +204,14 @@ public abstract class WorldEditPlayer {
      * @return true if a spot was found
      */
     public boolean descendLevel() {
-        Vector pos = getPosition();
+        Vector pos = getBlockIn();
         int x = pos.getBlockX();
         int y = pos.getBlockY() - 1;
         int z = pos.getBlockZ();
 
         byte free = 0;
 
-        while (y >= 0) {
+        while (y >= 1) {
             if (server.getBlockType(new Vector(x, y, z)) == 0) {
                 free++;
             } else {
@@ -219,8 +219,20 @@ public abstract class WorldEditPlayer {
             }
 
             if (free == 2) {
-                setPosition(new Vector(x + 0.5, y, z + 0.5));
-                return true;
+                // So we've found a spot, but we have to drop the player
+                // lightly and also check to see if there's something to
+                // stand upon
+                while (y >= 0) {
+                    if (server.getBlockType(new Vector(x, y, z)) != 0) {
+                        // Found a block!
+                        setPosition(new Vector(x + 0.5, y + 1, z + 0.5));
+                        return true;
+                    }
+                    
+                    y--;
+                }
+
+                return false;
             }
 
             y--;