Fix low power laser converter exploding after being painted and place…

…d back in the world (#383)

src/main/java/com/github/bartimaeusnek/crossmod/tectech/tileentites/tiered/TT_Abstract_LowPowerLaserThingy.java

@@ -98,7 +98,9 @@ public void saveNBTData(NBTTagCompound nbtTagCompound) {
 
     @Override
     public void loadNBTData(NBTTagCompound nbtTagCompound) {
-        Optional.ofNullable(nbtTagCompound).ifPresent(tag -> this.AMPERES = tag.getLong("AMPERES"));
+        if (nbtTagCompound != null && nbtTagCompound.hasKey("AMPERES")) {
+            this.AMPERES = nbtTagCompound.getLong("AMPERES");
+        }
     }
 
     @Override