clip: use super macro

Minor code improvement.

app/node/block/clip/clip.cpp

@@ -22,6 +22,8 @@
 
 namespace olive {
 
+#define super Block
+
 const QString ClipBlock::kBufferIn = QStringLiteral("buffer_in");
 
 ClipBlock::ClipBlock()
@@ -59,10 +61,10 @@ void ClipBlock::InvalidateCache(const TimeRange& range, const QString& from, int
     rational start = MediaToSequenceTime(range.in());
     rational end = MediaToSequenceTime(range.out());
 
-    Block::InvalidateCache(TimeRange(start, end), from, element, job_time);
+    super::InvalidateCache(TimeRange(start, end), from, element, job_time);
   } else {
     // Otherwise, pass signal along normally
-    Block::InvalidateCache(range, from, element, job_time);
+    super::InvalidateCache(range, from, element, job_time);
   }
 }
 
@@ -74,7 +76,7 @@ TimeRange ClipBlock::InputTimeAdjustment(const QString& input, int element, cons
     return TimeRange(SequenceToMediaTime(input_time.in()), SequenceToMediaTime(input_time.out()));
   }
 
-  return Block::InputTimeAdjustment(input, element, input_time);
+  return super::InputTimeAdjustment(input, element, input_time);
 }
 
 TimeRange ClipBlock::OutputTimeAdjustment(const QString& input, int element, const TimeRange& input_time) const
@@ -85,7 +87,7 @@ TimeRange ClipBlock::OutputTimeAdjustment(const QString& input, int element, con
     return TimeRange(MediaToSequenceTime(input_time.in()), MediaToSequenceTime(input_time.out()));
   }
 
-  return Block::OutputTimeAdjustment(input, element, input_time);
+  return super::OutputTimeAdjustment(input, element, input_time);
 }
 
 NodeValueTable ClipBlock::Value(const QString &output, NodeValueDatabase &value) const
@@ -104,7 +106,7 @@ NodeValueTable ClipBlock::Value(const QString &output, NodeValueDatabase &value)
 
 void ClipBlock::Retranslate()
 {
-  Block::Retranslate();
+  super::Retranslate();
 
   SetInputName(kBufferIn, tr("Buffer"));
 }