patch 8.2.3794: Vim9: cannot find script-local func using "s:"

Problem:    Vim9: cannot find script-local func using "s:". (Yegappan
            Lakshmanan)
Solution:   Skip the "s:".
diff --git a/src/userfunc.c b/src/userfunc.c
index 5f35f35..034bf9e 100644
--- a/src/userfunc.c
+++ b/src/userfunc.c
@@ -1885,13 +1885,14 @@
     {
 	char_u	*after_script = NULL;
 	long	sid = 0;
-	int	find_script_local = in_vim9script()
-				     && eval_isnamec1(*name) && name[1] != ':';
+	int	find_script_local = in_vim9script() && eval_isnamec1(*name)
+					   && (name[1] != ':' || *name == 's');
 
 	if (find_script_local)
 	{
 	    // Find script-local function before global one.
-	    func = find_func_with_sid(name, current_sctx.sc_sid);
+	    func = find_func_with_sid(name[0] == 's' && name[1] == ':'
+				       ? name + 2 : name, current_sctx.sc_sid);
 	    if (func != NULL)
 		return func;
 	}