read/write settings in restart files for bonded hybrid styles

this allows to properly restart table styles, which require
additional settings unlike all other bonded styles.

src/improper_hybrid.cpp

@@ -306,6 +306,7 @@ void ImproperHybrid::write_restart(FILE *fp)
     n = strlen(keywords[m]) + 1;
     fwrite(&n,sizeof(int),1,fp);
     fwrite(keywords[m],sizeof(char),n,fp);
+    styles[m]->write_restart_settings(fp);
   }
 }
 
@@ -331,6 +332,7 @@ void ImproperHybrid::read_restart(FILE *fp)
     if (me == 0) fread(keywords[m],sizeof(char),n,fp);
     MPI_Bcast(keywords[m],n,MPI_CHAR,0,world);
     styles[m] = force->new_improper(keywords[m],0,dummy);
+    styles[m]->read_restart_settings(fp);
   }
 }