Fixed widget removal

Author: sadko4u

src/main/widgets/specific/AudioEnvelope.cpp

@@ -214,8 +214,9 @@ namespace lsp
         void AudioEnvelope::destroy()
         {
             nFlags     |= FINALIZED;
-            Widget::destroy();
             do_destroy();
+
+            Widget::destroy();
         }
 
         void AudioEnvelope::do_destroy()

src/main/widgets/specific/AudioSample.cpp

@@ -1332,7 +1332,7 @@ namespace lsp
 
             AudioEnvelope *envelope = widget_cast<AudioEnvelope>(child);
             if (envelope != NULL)
-                return vChannels.premove(envelope);
+                return vEnvelopes.premove(envelope);
 
             return STATUS_BAD_TYPE;
         }