patch 8.2.3352: Vim9: error for nested :enddef has wrong line number

Problem:    Vim9: error for nested :enddef has wrong line number.
Solution:   Compute the line number.

src/testdir/test_vim9_func.vim

@@ -630,6 +630,17 @@ def Test_nested_function()
       assert_equal(2, Test())
   END
   CheckScriptSuccess(lines)
+
+  lines =<< trim END
+      vim9script
+      def Outer()
+        def Inner()
+          echo 'hello'
+        enddef burp
+      enddef
+      defcompile
+  END
+  CheckScriptFailure(lines, 'E1173: Text found after enddef: burp', 3)
 enddef
 
 def Test_not_nested_function()

src/userfunc.c

@@ -822,6 +822,8 @@ get_function_body(
 		    else if (*p != NUL && *p != (vim9_function ? '#' : '"')
 					   && (vim9_function || p_verbose > 0))
 		    {
+			SOURCING_LNUM = sourcing_lnum_top
+							+ newlines->ga_len + 1;
 			if (eap->cmdidx == CMD_def)
 			    semsg(_(e_text_found_after_enddef_str), p);
 			else

src/version.c

@@ -755,6 +755,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    3352,
 /**/
     3351,
 /**/