X-Git-Url: https://ncurses.scripts.mit.edu/?p=ncurses.git;a=blobdiff_plain;f=ncurses%2Ftinfo%2Fdoalloc.c;h=e3b1a2e96c1bf378f2c0f70c8110762187ecfbb5;hp=0bda12cae8be07c4fce3661a583e5e557d1994b9;hb=312665d3aaaf5d8e3ba34d80fdd650abf758272a;hpb=1f7a36fe16b11bb4aab51be89bbc1b0f75936b78

diff --git a/ncurses/tinfo/doalloc.c b/ncurses/tinfo/doalloc.c
index 0bda12ca..e3b1a2e9 100644
--- a/ncurses/tinfo/doalloc.c
+++ b/ncurses/tinfo/doalloc.c
@@ -1,5 +1,5 @@
 /****************************************************************************
- * Copyright 2020 Thomas E. Dickey                                          *
+ * Copyright 2020,2021 Thomas E. Dickey                                     *
  * Copyright 1998-2002,2012 Free Software Foundation, Inc.                  *
  *                                                                          *
  * Permission is hereby granted, free of charge, to any person obtaining a  *
@@ -40,15 +40,18 @@
 
 #include <curses.priv.h>
 
-MODULE_ID("$Id: doalloc.c,v 1.13 2020/08/30 00:27:15 tom Exp $")
+MODULE_ID("$Id: doalloc.c,v 1.14 2021/04/24 23:43:39 tom Exp $")
 
 void *
 _nc_doalloc(void *oldp, size_t amount)
 {
     void *newp;
 
-    if (oldp != 0) {
-	if ((newp = realloc(oldp, amount)) == 0) {
+    if (oldp != NULL) {
+	if (amount == 0) {
+	    free(oldp);
+	    newp = NULL;
+	} else if ((newp = realloc(oldp, amount)) == 0) {
 	    free(oldp);
 	    errno = ENOMEM;	/* just in case 'free' reset */
 	}