fixed compile issues

project/effect.cpp

@@ -27,7 +27,6 @@
 #include "effects/internal/paneffect.h"
 #include "effects/internal/shakeeffect.h"
 #include "effects/internal/cornerpineffect.h"
-#include "effects/internal/maskeffect.h"
 
 #include <QCheckBox>
 #include <QGridLayout>
@@ -59,8 +58,7 @@ Effect* create_effect(Clip* c, const EffectMeta* em) {
 		case EFFECT_INTERNAL_PAN: return new PanEffect(c, em);
 		case EFFECT_INTERNAL_TONE: return new ToneEffect(c, em);
         case EFFECT_INTERNAL_SHAKE: return new ShakeEffect(c, em);
-		case EFFECT_INTERNAL_CORNERPIN: return new CornerPinEffect(c, em);
-        case EFFECT_INTERNAL_MASK: return new MaskEffect(c, em);
+        case EFFECT_INTERNAL_CORNERPIN: return new CornerPinEffect(c, em);
 		}
 	} else {
 		dout << "[ERROR] Invalid effect data";

project/projectmodel.cpp

@@ -18,14 +18,19 @@ void ProjectModel::destroy_root() {
     if (panel_sequence_viewer != NULL) panel_sequence_viewer->viewer_widget->delete_function();
     if (panel_footage_viewer != NULL) panel_footage_viewer->viewer_widget->delete_function();
 
-    if (root_item != NULL) delete root_item;
+    if (root_item != NULL) {
+        beginRemoveRows(QModelIndex(), 0, root_item->childCount());
+        delete root_item;
+        endRemoveRows();
+    }
 }
 
 void ProjectModel::clear() {
     destroy_root();
+    beginResetModel();
     root_item = new Media(0);
     root_item->root = true;
-    update_data();
+    endResetModel();
 }
 
 Media *ProjectModel::get_root() {