win: skip bad paths in dllist

Probably needs WTF-8 support to be correct, but may avoid crashing.

Fix #38838

src/sys.c

@@ -600,9 +600,11 @@ JL_DLLEXPORT int jl_dllist(jl_array_t *list)
  }
  } while (cb < cbNeeded);
  for (i = 0; i < cbNeeded / sizeof(HMODULE); i++) {
- jl_array_grow_end((jl_array_t*)list, 1);
  const char *path = jl_pathname_for_handle(hMods[i]);
  // XXX: change to jl_arrayset if array storage allocation for Array{String,1} changes:
+ if (path == NULL)
+ continue;
+ jl_array_grow_end((jl_array_t*)list, 1);
  jl_value_t *v = jl_cstr_to_string(path);
  jl_array_ptr_set(list, jl_array_dim0(list) - 1, v);
  }