cache.h: rename cache_def_free to cache_def_clear

Rename cache_def_free to cache_def_clear as it doesn't free the struct
cache_def, but just clears its content.

Signed-off-by: Karsten Blees <blees@dcon.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

cache.h

@@ -1074,7 +1074,7 @@ struct cache_def {
 	int prefix_len_stat_func;
 };
 #define CACHE_DEF_INIT { STRBUF_INIT, 0, 0, 0 }
-static inline void cache_def_free(struct cache_def *cache)
+static inline void cache_def_clear(struct cache_def *cache)
 {
 	strbuf_release(&cache->path);
 }

preload-index.c

@@ -63,7 +63,7 @@ static void *preload_thread(void *_data)
 			continue;
 		ce_mark_uptodate(ce);
 	} while (--nr > 0);
-	cache_def_free(&cache);
+	cache_def_clear(&cache);
 	return NULL;
 }