Fixed redundant done invocation on asByteArray call

compiler/backend/src/org/jetbrains/jet/codegen/ClassFileFactory.java

@@ -71,7 +71,7 @@ public final class ClassFileFactory extends GenerationStateAware implements Outp
         return answer;
     }
 
-    private void done() {
+    void done() {
         if (!isDone) {
             isDone = true;
             for (PackageCodegen codegen : package2codegen.values()) {
@@ -199,15 +199,15 @@ public final class ClassFileFactory extends GenerationStateAware implements Outp
             );
         }
 
+        @NotNull
         @Override
         public byte[] asByteArray() {
-            done();
             return builderFactory.asBytes(generators.get(relativeClassFilePath).classBuilder);
         }
 
+        @NotNull
         @Override
         public String asText() {
-            done();
             return builderFactory.asText(generators.get(relativeClassFilePath).classBuilder);
         }
     }

compiler/backend/src/org/jetbrains/jet/codegen/KotlinCodegenFacade.java

@@ -56,6 +56,8 @@ public class KotlinCodegenFacade {
         for (Map.Entry<FqName, Collection<JetFile>> entry : packageFqNameToFiles.entrySet()) {
             generatePackage(state, entry.getKey(), entry.getValue(), errorHandler);
         }
+
+        state.getFactory().done();
     }
 
     public static void generatePackage(