Fixed #686 - "Disk Drive and Storage Disk issue in server environment."

CHANGELOG.md

@@ -5,6 +5,7 @@
 - Removed RF support (raoulvdberge)
 - Removed MCMultiPart support (will be re-added as soon as MCMultiPart for MC 1.11 is available) (raoulvdberge)
 - Removed IC2 support (will be re-added as soon as IC2 for MC 1.11 is available) (raoulvdberge)
+- Fixed not being able to place disks in Disk Drives on servers (raoulvdberge)
 
 ### 1.2.6
 - Processing patterns can now insert buckets (way2muchnoise)

src/main/java/com/raoulvdberge/refinedstorage/apiimpl/storage/item/ItemStorageNBT.java

@@ -235,6 +235,7 @@ public abstract class ItemStorageNBT implements IItemStorage {
         NBTTagCompound otherTag = new NBTTagCompound();
 
         otherTag.setInteger(NBT_STORED, getStoredFromNBT(tag));
+        otherTag.setTag(NBT_ITEMS, new NBTTagList()); // To circumvent not being able to insert stack (see ItemStorageNBT#isValid(ItemStack)).
 
         return otherTag;
     }