Fixed Excavation not rewarding XP.

src/main/java/com/gmail/nossr50/listeners/mcBlockListener.java

@@ -176,7 +176,7 @@ public class mcBlockListener implements Listener {
          * EXCAVATION
          */
 
-        if (Excavation.canBeGigaDrillBroken(mat) && mcPermissions.getInstance().excavation(player) && block.hasMetadata("mcmmoPlacedBlock")) {
+        if (Excavation.canBeGigaDrillBroken(mat) && mcPermissions.getInstance().excavation(player) && !block.hasMetadata("mcmmoPlacedBlock")) {
             if (LoadProperties.excavationRequiresShovel && ItemChecks.isShovel(inhand)) {
                 Excavation.excavationProcCheck(block, player);
             }

src/main/java/com/gmail/nossr50/skills/Excavation.java

@@ -40,6 +40,7 @@ public class Excavation {
         case SAND:
         case SOUL_SAND:
             return true;
+
         default:
             return false;
         }