patch 8.2.2265: error message for missing endfunc/enddef is last line

Problem:    Error message for missing endfunc/enddef is last line.
Solution:   Report the line where the function starts. (closes #7582)

src/testdir/test_vim9_func.vim

@@ -98,6 +98,24 @@ def Test_endfunc_enddef()
   CheckScriptFailure(lines, 'E1152:', 4)
 enddef
 
+def Test_missing_endfunc_enddef()
+  var lines =<< trim END
+    vim9script
+    def Test()
+      echo 'test'
+    endef
+  END
+  CheckScriptFailure(lines, 'E1057:', 2)
+
+  lines =<< trim END
+    vim9script
+    func Some()
+      echo 'test'
+    enfffunc
+  END
+  CheckScriptFailure(lines, 'E126:', 2)
+enddef
+
 def ReturnString(): string
   return 'string'
 enddef