From 1812bcfc8c20dfea2df38da7f7b042c2d62f551b Mon Sep 17 00:00:00 2001
From: Darkvater <darkvater@openttd.org>
Date: Wed, 20 Dec 2006 20:43:52 +0000
Subject: (svn r7517) -Codechange: Set pointers to NULL when freeing the newgrf
 config variables and add the proper const to CopyGRFConfigList

---
 newgrf_config.c | 17 +++++++++--------
 newgrf_config.h |  3 ++-
 settings.c      |  2 +-
 3 files changed, 12 insertions(+), 10 deletions(-)

diff --git a/newgrf_config.c b/newgrf_config.c
index 924c3c628..b0f06d110 100644
--- a/newgrf_config.c
+++ b/newgrf_config.c
@@ -82,15 +82,16 @@ bool FillGRFDetails(GRFConfig *config, bool is_static)
 }
 
 
-void ClearGRFConfig(GRFConfig *config)
+void ClearGRFConfig(GRFConfig **config)
 {
 	/* GCF_COPY as in NOT strdupped/alloced the filename, name and info */
-	if (!HASBIT(config->flags, GCF_COPY)) {
-		free(config->filename);
-		free(config->name);
-		free(config->info);
+	if (!HASBIT((*config)->flags, GCF_COPY)) {
+		free((*config)->filename);
+		free((*config)->name);
+		free((*config)->info);
 	}
-	free(config);
+	free(*config);
+	*config = NULL;
 }
 
 
@@ -100,13 +101,13 @@ void ClearGRFConfigList(GRFConfig *config)
 	GRFConfig *c, *next;
 	for (c = config; c != NULL; c = next) {
 		next = c->next;
-		ClearGRFConfig(c);
+		ClearGRFConfig(&c);
 	}
 }
 
 
 /* Copy a GRF Config list */
-static GRFConfig **CopyGRFConfigList(GRFConfig **dst, GRFConfig *src)
+GRFConfig **CopyGRFConfigList(GRFConfig **dst, const GRFConfig *src)
 {
 	GRFConfig *c;
 
diff --git a/newgrf_config.h b/newgrf_config.h
index 42ab2feef..c6f49bb60 100644
--- a/newgrf_config.h
+++ b/newgrf_config.h
@@ -43,7 +43,8 @@ extern GRFConfig *_grfconfig_static;
 void ScanNewGRFFiles(void);
 const GRFConfig *FindGRFConfig(uint32 grfid, uint8 *md5sum);
 GRFConfig *GetGRFConfig(uint32 grfid);
-void ClearGRFConfig(GRFConfig *config);
+GRFConfig **CopyGRFConfigList(GRFConfig **dst, const GRFConfig *src);
+void ClearGRFConfig(GRFConfig **config);
 void ClearGRFConfigList(GRFConfig *config);
 void ResetGRFConfig(bool defaults);
 bool IsGoodGRFConfigList(void);
diff --git a/settings.c b/settings.c
index 498f5d2f1..af40febfa 100644
--- a/settings.c
+++ b/settings.c
@@ -1534,7 +1534,7 @@ static GRFConfig *GRFLoadConfig(IniFile *ini, const char *grpname, bool is_stati
 			}
 
 			ShowInfoF("ini: ignoring invalid NewGRF '%s': %s", item->name, msg);
-			ClearGRFConfig(c);
+			ClearGRFConfig(&c);
 			continue;
 		}
 
-- 
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