Back-patch 9.4-era compiler warning fixes into older branches.

Back-patch commit 4e182361804f8688cef953c998e24134e606aea4
(another thing that longfin's version of clang doesn't like).

diff --git a/src/pl/plperl/plperl.c b/src/pl/plperl/plperl.c
index 703df790c2835b77485380e1a48ab5b9a633b80c..5c0877b2797f1bba7e0d6b861e0759897bf8b049 100644 (file)
--- a/src/pl/plperl/plperl.c
+++ b/src/pl/plperl/plperl.c
@@ -1778,7 +1778,7 @@ plperl_inline_handler(PG_FUNCTION_ARGS)
    /* Set up a callback for error reporting */
    pl_error_context.callback = plperl_inline_callback;
    pl_error_context.previous = error_context_stack;
-   pl_error_context.arg = (Datum) 0;
+   pl_error_context.arg = NULL;
    error_context_stack = &pl_error_context;
 
    /*