compat/unsetenv.c: Fix a sparse warning

diff --git a/archive-tar.c b/archive-tar.c
index d1cce46e3310d64af32b231de697449ae90ddccf..719b6298e6abf9c9e9e8009ec49dfc76d0d9e49b 100644 (file)
--- a/archive-tar.c
+++ b/archive-tar.c
@@ -327,20 +327,12 @@ static struct archiver *find_tar_filter(const char *name, int len)
 static int tar_filter_config(const char *var, const char *value, void *data)
 {
        struct archiver *ar;
-       const char *dot;
        const char *name;
        const char *type;
        int namelen;
 
-       if (prefixcmp(var, "tar."))
+       if (parse_config_key(var, "tar", &name, &namelen, &type) < 0 || !name)
                return 0;
-       dot = strrchr(var, '.');
-       if (dot == var + 9)
-               return 0;
-
-       name = var + 4;
-       namelen = dot - name;
-       type = dot + 1;
 
        ar = find_tar_filter(name, namelen);
        if (!ar) {