tuning distance for contact threshold to 6A

src/struct.h

@@ -11,7 +11,7 @@
 
 #define COEF_DEGREE_TO_RADIAN 0.017453293   /* Coefficient to convert degrees to radians */
 #define NB_MAX_ATOM_PER_RES 100              /* No residue has more atoms than that */
-#define DIST_FOR_CONTACT 10                 /* Distance under which we consider 
+#define DIST_FOR_CONTACT 6                 /* Distance under which we consider 
                                              * two residues are in contact */
 
 /* This is the format of a line in a PDB file */