Fixed #1842 AS1/2 Better handling obfuscated code, for..in

libsrc/ffdec_lib/src/com/jpexs/decompiler/graph/model/CommaExpressionItem.java

@@ -48,6 +48,9 @@ public class CommaExpressionItem extends GraphTargetItem {
     public GraphTextWriter appendTo(GraphTextWriter writer, LocalData localData) throws InterruptedException {
         boolean first = true;
         for (GraphTargetItem t : commands) {
+            if (t.isEmpty()) {
+                continue;
+            }
             if (!first) {
                 writer.append(", ");
             }

libsrc/ffdec_lib/src/com/jpexs/decompiler/graph/model/DoWhileItem.java

@@ -101,13 +101,15 @@ public class DoWhileItem extends LoopItem implements Block {
         }
         writer.append("(");
 
+        boolean first = true;
         for (int i = 0; i < expression.size(); i++) {
             if (expression.get(i).isEmpty()) {
                 continue;
             }
-            if (i != 0) {
+            if (!first) {
                 writer.append(", ");
             }
+            first = false;            
             if (i == expression.size() - 1) {
                 expression.get(i).toStringBoolean(writer, localData);
             } else {

libsrc/ffdec_lib/src/com/jpexs/decompiler/graph/model/WhileItem.java

@@ -92,13 +92,15 @@ public class WhileItem extends LoopItem implements Block {
             writer.append(" ");
         }
         writer.append("(");
+        boolean first = true;
         for (int i = 0; i < expression.size(); i++) {
             if (expression.get(i).isEmpty()) {
                 continue;
             }
-            if (i != 0) {
+            if (!first) {
                 writer.append(", ");
             }
+            first = false;
             if (i == expression.size() - 1) {
                 expression.get(i).toStringBoolean(writer, localData);
             } else {