fix lxc_file_cb prototype

src/lxc/conf.c

@@ -113,7 +113,7 @@ static struct mount_opt mount_opt[] = {
 	{ NULL,         0, 0              },
 };
 
-static int configure_find_fstype_cb(void* buffer, void *data)
+static int configure_find_fstype_cb(char* buffer, void *data)
 {
 	struct cbarg {
 		const char *rootfs;
@@ -338,7 +338,7 @@ static int setup_tty(const char *rootfs, const struct lxc_tty_info *tty_info)
 	return 0;
 }
 
-static int setup_rootfs_pivot_root_cb(void *buffer, void *data)
+static int setup_rootfs_pivot_root_cb(char *buffer, void *data)
 {
 	struct lxc_list	*mountlist, *listentry, *iterator;
 	char *pivotdir, *mountpoint, *mountentry;

src/lxc/confile.c

@@ -620,7 +620,7 @@ static int config_utsname(const char *key, char *value, struct lxc_conf *lxc_con
 	return 0;
 }
 
-static int parse_line(void *buffer, void *data)
+static int parse_line(char *buffer, void *data)
 {
 	struct config *config;
 	char *line = buffer;

src/lxc/parse.h

@@ -26,7 +26,7 @@
 typedef int (*lxc_dir_cb)(const char *name, const char *directory,
 			  const char *file, void *data);
 
-typedef int (*lxc_file_cb)(void *buffer, void *data);
+typedef int (*lxc_file_cb)(char *buffer, void *data);
 
 extern int lxc_dir_for_each(const char *name, const char *directory,
 			    lxc_dir_cb callback, void *data);