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

tglsfdc · tglsfdc · commit b5005ffa4627 · 2017-02-17T17:12:14.000-05:00
Back-patch commit 4e18236 (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
@@ -1787,7 +1787,7 @@ 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;
 
 	/*
