vim-patch:9.0.0057: has('patch-xxx') returns true

Problem:    has('patch-xxx') returns true.
Solution:   Check for digit. (closes vim/vim#10751)

https://github.com/vim/vim/commit/5154a8880034b7bb94186d37bcecc6ee1a96f732

Co-authored-by: Bram Moolenaar <Bram@vim.org>

src/nvim/eval/funcs.c

@@ -2813,7 +2813,7 @@ static void f_has(typval_T *argvars, typval_T *rettv, EvalFuncData fptr)
                  && (minor < VIM_VERSION_MINOR
                      || (minor == VIM_VERSION_MINOR
                          && has_vim_patch(atoi(name + 10))))));
-      } else {
+      } else if (ascii_isdigit(name[5])) {
         n = has_vim_patch(atoi(name + 5));
       }
     } else if (STRNICMP(name, "nvim-", 5) == 0) {

test/old/testdir/test_expr.vim

@@ -43,6 +43,7 @@ func Test_version()
   call assert_false(has('patch-7.4.'))
   call assert_false(has('patch-9.1.0'))
   call assert_false(has('patch-9.9.1'))
+  call assert_false(has('patch-abc'))
 endfunc
 
 func Test_op_ternary()