Try to fix energy overflow

src/main/java/crazypants/enderio/conduit/AbstractConduit.java

@@ -92,7 +92,9 @@ public abstract class AbstractConduit implements IConduit {
      * 
      * @see needUpdateConnections()
      */
-    protected boolean needUpdateConnections = false;
+    private boolean needUpdateConnections = false;
+
+    private boolean isUpdatingConnections = false;
 
     protected AbstractConduit() {}
 
@@ -444,10 +446,13 @@ public abstract class AbstractConduit implements IConduit {
     }
 
     private void updateConnections() {
-        if (!connectionsDirty) {
+        if (!connectionsDirty && !needUpdateConnections) {
             return;
         }
 
+        isUpdatingConnections = true;
+        needUpdateConnections = false;
+
         boolean externalConnectionsChanged = false;
         List<ForgeDirection> copy = new ArrayList<ForgeDirection>(externalConnections);
         // remove any no longer valid connections
@@ -471,12 +476,8 @@ public abstract class AbstractConduit implements IConduit {
             connectionsChanged();
         }
 
-        if (needUpdateConnections) {
-            // Seems the update was not successfull, let's try on the next Tick.
-            needUpdateConnections = false;
-        } else {
-            connectionsDirty = false;
-        }
+        connectionsDirty = false;
+        isUpdatingConnections = false;
     }
 
     /**
@@ -488,7 +489,9 @@ public abstract class AbstractConduit implements IConduit {
      * See this PR for more info: https://github.com/GTNewHorizons/EnderIO/pull/111
      */
     protected void needUpdateConnections() {
-        needUpdateConnections = true;
+        if (isUpdatingConnections) {
+            needUpdateConnections = true;
+        }
     }
 
     @Override

src/main/java/crazypants/enderio/item/ItemMagnet.java

@@ -131,6 +131,10 @@ public class ItemMagnet extends ItemEnergyContainer implements IResourceTooltipP
 
     @Override
     public int receiveEnergy(ItemStack container, int maxReceive, boolean simulate) {
+        if (maxReceive < 0) {
+            return 0;
+        }
+
         int res = super.receiveEnergy(container, maxReceive, simulate);
         if (res != 0 && !simulate) {
             updateDamage(container);
@@ -148,6 +152,10 @@ public class ItemMagnet extends ItemEnergyContainer implements IResourceTooltipP
     }
 
     public int extractEnergyInternal(ItemStack container, int maxExtract, boolean simulate) {
+        if (maxExtract < 0) {
+            return 0;
+        }
+
         int res = super.extractEnergy(container, maxExtract, simulate);
         if (res != 0 && !simulate) {
             updateDamage(container);

src/main/java/crazypants/enderio/teleport/ItemTeleportStaff.java

@@ -67,6 +67,12 @@ public class ItemTeleportStaff extends ItemTravelStaff {
         return equipped;
     }
 
+    @Override
+    public int receiveEnergy(ItemStack container, int maxReceive, boolean simulate) {
+        // Don't allow receiving energy, since we have infinite energy.
+        return 0;
+    }
+
     @Override
     public int extractEnergy(ItemStack container, int maxExtract, boolean simulate) {
         // Don't allow extracting energy.

src/main/java/crazypants/enderio/teleport/ItemTravelStaff.java

@@ -103,6 +103,10 @@ public class ItemTravelStaff extends ItemEnergyContainer implements IItemOfTrave
 
     @Override
     public int receiveEnergy(ItemStack container, int maxReceive, boolean simulate) {
+        if (maxReceive < 0) {
+            return 0;
+        }
+
         int res = super.receiveEnergy(container, maxReceive, simulate);
         if (res != 0 && !simulate) {
             updateDamage(container);
@@ -112,6 +116,10 @@ public class ItemTravelStaff extends ItemEnergyContainer implements IItemOfTrave
 
     @Override
     public int extractEnergy(ItemStack container, int maxExtract, boolean simulate) {
+        if (maxExtract < 0) {
+            return 0;
+        }
+
         int res = super.extractEnergy(container, maxExtract, simulate);
         if (res != 0 && !simulate) {
             updateDamage(container);