Possible NullPointerException

[Pingger]

https://github.com/RegalOwl/HyperConomy/blob/424200b94fd2fb57364a5f36e927ee040e2d480b/src/main/java/regalowl/hyperconomy/bukkit/BukkitCommon.java#L310
https://github.com/RegalOwl/HyperConomy/blob/424200b94fd2fb57364a5f36e927ee040e2d480b/src/main/java/regalowl/hyperconomy/bukkit/BukkitCommon.java#L315
https://github.com/RegalOwl/HyperConomy/blob/424200b94fd2fb57364a5f36e927ee040e2d480b/src/main/java/regalowl/hyperconomy/bukkit/BukkitCommon.java#L317
https://github.com/RegalOwl/HyperConomy/blob/424200b94fd2fb57364a5f36e927ee040e2d480b/src/main/java/regalowl/hyperconomy/bukkit/BukkitCommon.java#L320

currentInventory might be null
bukkitInv might be null
p might be null

https://github.com/RegalOwl/HyperConomy/blob/424200b94fd2fb57364a5f36e927ee040e2d480b/src/main/java/regalowl/hyperconomy/command/Lowstock.java#L50
https://github.com/RegalOwl/HyperConomy/blob/424200b94fd2fb57364a5f36e927ee040e2d480b/src/main/java/regalowl/hyperconomy/command/Topitems.java#L53
s might be null

https://github.com/RegalOwl/HyperConomy/blob/424200b94fd2fb57364a5f36e927ee040e2d480b/src/main/java/regalowl/hyperconomy/display/InfoSign.java#L125
enchantClass might be null

https://github.com/RegalOwl/HyperConomy/blob/424200b94fd2fb57364a5f36e927ee040e2d480b/src/main/java/regalowl/hyperconomy/display/TransactionSignHandler.java#L160
he might be null