Patch 8.2.3436
Problem:    Check for optional bool type has confusing return type.
Solution:   Explicitly return OK.
Files:      src/typval.c


*** ../vim-8.2.3435/src/typval.c        2021-08-15 13:49:38.126905573 +0200
--- src/typval.c        2021-09-13 21:35:33.021155844 +0200
***************
*** 459,471 ****
  }
  
  /*
!  * Check for an optional bool argument at 'idx'
   */
      int
  check_for_opt_bool_arg(typval_T *args, int idx)
  {
!     return (args[idx].v_type == VAR_UNKNOWN
!           || check_for_bool_arg(args, idx) != FAIL);
  }
  
  /*
--- 459,473 ----
  }
  
  /*
!  * Check for an optional bool argument at 'idx'.
!  * Return FAIL if the type is wrong.
   */
      int
  check_for_opt_bool_arg(typval_T *args, int idx)
  {
!     if (args[idx].v_type == VAR_UNKNOWN)
!       return OK;
!     return check_for_bool_arg(args, idx);
  }
  
  /*
*** ../vim-8.2.3435/src/version.c       2021-09-13 18:25:50.456525311 +0200
--- src/version.c       2021-09-13 21:35:49.013141674 +0200
***************
*** 757,758 ****
--- 757,760 ----
  {   /* Add new patch number below this line */
+ /**/
+     3436,
  /**/

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