Remove WaveTrack.h from other headers

src/WaveTrackLocation.h

@@ -0,0 +1,32 @@
+/**********************************************************************
+
+Audacity: A Digital Audio Editor
+
+WaveTrackLocation.h
+
+Paul Licameli -- split from WaveTrack.h
+
+**********************************************************************/
+
+#ifndef __AUDACITY_WAVE_TRACK_LOCATION__
+#define __AUDACITY_WAVE_TRACK_LOCATION__
+
+struct WaveTrackLocation {
+
+   enum LocationType {
+      locationCutLine = 1,
+      locationMergePoint
+   };
+
+   // Position of track location
+   double pos;
+
+   // Type of track location
+   LocationType typ;
+
+   // Only for typ==locationMergePoint
+   int clipidx1; // first clip (left one)
+   int clipidx2; // second clip (right one)
+};
+
+#endif