fix NPE in FluidPatternDetails (#163)

src/main/java/com/glodblock/github/client/gui/container/base/FCContainerEncodeTerminal.java

@@ -258,6 +258,9 @@ public abstract class FCContainerEncodeTerminal extends ContainerItemMonitor
     }
 
     protected ItemStack stampAuthor(ItemStack patternStack) {
+        if (patternStack.stackTagCompound == null) {
+            patternStack.stackTagCompound = new NBTTagCompound();
+        }
         patternStack.stackTagCompound.setString("author", getPlayerInv().player.getCommandSenderName());
         return patternStack;
     }

src/main/java/com/glodblock/github/util/FluidPatternDetails.java

@@ -28,7 +28,7 @@ public class FluidPatternDetails implements ICraftingPatternDetails, Comparable<
 
     public FluidPatternDetails(ItemStack stack) {
         this.patternStack = stack;
-        if (stack.stackTagCompound.hasKey("author")) {
+        if (stack.stackTagCompound != null && stack.stackTagCompound.hasKey("author")) {
             final ItemStack forComparison = this.patternStack.copy();
             forComparison.stackTagCompound.removeTag("author");
             this.patternStackAe = Objects.requireNonNull(AEItemStack.create(forComparison)); // s2g