patch 8.2.2572: Vim9: crash when getting the types for a legacy function

Problem:    Vim9: crash when getting the types for a legacy function.
Solution:   Initialize the type list growarray. (closes #7929)

src/testdir/test_vim9_func.vim

@@ -739,6 +739,19 @@ def Test_lambda_uses_assigned_var()
         'x = filter(["bbb"], (_, v) => v =~ x)'])
 enddef
 
+def Test_pass_legacy_lambda_to_def_func()
+  var lines =<< trim END
+      vim9script
+      func Foo()
+        eval s:Bar({x -> 0})
+      endfunc
+      def Bar(y: any)
+      enddef
+      Foo()
+  END
+  CheckScriptSuccess(lines)
+enddef
+
 " Default arg and varargs
 def MyDefVarargs(one: string, two = 'foo', ...rest: list<string>): string
   var res = one .. ',' .. two