Typo in comment in postgres_fdw.c

diff --git a/contrib/postgres_fdw/postgres_fdw.c b/contrib/postgres_fdw/postgres_fdw.c
new file mode 100644
index 080cb0a..4441671
*** a/contrib/postgres_fdw/postgres_fdw.c
--- b/contrib/postgres_fdw/postgres_fdw.c
*************** foreign_join_ok(PlannerInfo *root, RelOp
*** 4251,4257 ****
  			break;
  
  		default:
! 			/* Should not happen, we have just check this above */
  			elog(ERROR, "unsupported join type %d", jointype);
  	}
  
--- 4251,4257 ----
  			break;
  
  		default:
! 			/* Should not happen, we have just checked this above */
  			elog(ERROR, "unsupported join type %d", jointype);
  	}