trying to fix undo bug

effects/effects.h

@@ -29,7 +29,7 @@ class TransformEffect : public Effect {
 public:
     TransformEffect(Clip* c);
 	void process_gl(int* anchor_x, int* anchor_y);
-    Effect* copy();
+    Effect* copy(Clip* c);
 
 	QSpinBox* position_x;
 	QSpinBox* position_y;
@@ -52,7 +52,7 @@ class VolumeEffect : public Effect {
 public:
     VolumeEffect(Clip* c);
     void process_audio(uint8_t* samples, int nb_bytes);
-    Effect* copy();
+    Effect* copy(Clip* c);
     void load(QXmlStreamReader* stream);
     void save(QXmlStreamWriter* stream);
 
@@ -63,7 +63,7 @@ class PanEffect : public Effect {
 public:
     PanEffect(Clip* c);
     void process_audio(uint8_t* samples, int nb_bytes);
-    Effect* copy();
+    Effect* copy(Clip* c);
     void load(QXmlStreamReader* stream);
     void save(QXmlStreamWriter* stream);
 

effects/paneffect.cpp

@@ -25,8 +25,8 @@ PanEffect::PanEffect(Clip* c) : Effect(c) {
 	pan_val->setValue(0);
 }
 
-Effect* PanEffect::copy() {
-    PanEffect* p = new PanEffect(parent_clip);
+Effect* PanEffect::copy(Clip* c) {
+    PanEffect* p = new PanEffect(c);
     p->pan_val->setValue(pan_val->value());
     return p;
 }

effects/transformeffect.cpp

@@ -93,8 +93,8 @@ TransformEffect::TransformEffect(Clip* c) : Effect(c) {
 	connect(uniform_scale_box, SIGNAL(toggled(bool)), this, SLOT(field_changed()));
 }
 
-Effect* TransformEffect::copy() {
-    TransformEffect* t = new TransformEffect(parent_clip);
+Effect* TransformEffect::copy(Clip* c) {
+    TransformEffect* t = new TransformEffect(c);
     t->position_x->setValue(position_x->value());
     t->position_y->setValue(position_y->value());
     t->scale_x->setValue(scale_x->value());

effects/volumeeffect.cpp

@@ -25,8 +25,8 @@ VolumeEffect::VolumeEffect(Clip* c) : Effect(c) {
 	volume_val->setValue(100);
 }
 
-Effect* VolumeEffect::copy() {
-    VolumeEffect* v = new VolumeEffect(parent_clip);
+Effect* VolumeEffect::copy(Clip* c) {
+    VolumeEffect* v = new VolumeEffect(c);
     v->volume_val->setValue(volume_val->value());
     return v;
 }