Back-patch 9.4-era compiler warning fixes into older branches.
Back-patch commit
(another thing that longfin's version of clang doesn't like).
@@ -1777,7 +1777,7 @@ 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;
/*
