Provide git_config with a callback-data parameter

git_config() only had a function parameter, but no callback data
parameter.  This assumes that all callback functions only modify
global variables.

With this patch, every callback gets a void * parameter, and it is hoped
that this will help the libification effort.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 3 insertions, 2 deletions

diff --git a/alias.c b/alias.c
index 116cac87c3..995f3e6a0a 100644
--- a/alias.c
+++ b/alias.c
@@ -2,7 +2,8 @@
 
 static const char *alias_key;
 static char *alias_val;
-static int alias_lookup_cb(const char *k, const char *v)
+
+static int alias_lookup_cb(const char *k, const char *v, void *cb)
 {
 	if (!prefixcmp(k, "alias.") && !strcmp(k+6, alias_key)) {
 		if (!v)
@@ -17,6 +18,6 @@ char *alias_lookup(const char *alias)
 {
 	alias_key = alias;
 	alias_val = NULL;
-	git_config(alias_lookup_cb);
+	git_config(alias_lookup_cb, NULL);
 	return alias_val;
 }