Stack handling improved - no more StackEmptyException

And/Or handling improved
Preprocessor instructions introduced - §§pop,§§push...

libsrc/ffdec_lib/src/com/jpexs/decompiler/graph/TranslateStack.java

@@ -16,11 +16,51 @@
  */
 package com.jpexs.decompiler.graph;
 
+import com.jpexs.decompiler.graph.model.PopItem;
 import java.util.Stack;
+import java.util.logging.Level;
+import java.util.logging.Logger;
 
 /**
  *
  * @author JPEXS
  */
 public class TranslateStack extends Stack<GraphTargetItem> {
+
+    private static PopItem pop = new PopItem(null);
+
+    private String path;
+
+    public TranslateStack(String path) {
+        this.path = path;
+    }
+
+    public String getPath() {
+        return path;
+    }
+
+    @Override
+    public synchronized GraphTargetItem peek() {
+        if (path != null) {
+            if (this.isEmpty()) {
+                Logger.getLogger(TranslateStack.class.getName()).log(Level.FINE, "{0}: Attemp to Peek empty stack", path);
+                return pop;
+            }
+        }
+        return super.peek();
+    }
+
+    @Override
+    public synchronized GraphTargetItem pop() {
+        if (path != null) {
+            if (this.isEmpty()) {
+                PopItem oldpop = pop;
+                pop = new PopItem(null);
+                Logger.getLogger(TranslateStack.class.getName()).log(Level.FINE, "{0}: Attemp to Pop empty stack", path);
+                return oldpop;
+            }
+        }
+        return super.pop();
+    }
+
 }