Enable write_data

src/USER-MISC/dihedral_fourier.h

@@ -33,6 +33,7 @@ class DihedralFourier : public Dihedral {
   void coeff(int, char **);
   void write_restart(FILE *);
   void read_restart(FILE *);
+  void write_data(FILE *);
 
  protected:
   double **k,**cos_shift,**sin_shift,**shift;