Merge pull request #1158 from rick/i-do-not-think-this-means-what-you-think-it-means

don't deref before we've asserted

src/reflog.c

@@ -208,10 +208,10 @@ int git_reflog_read(git_reflog **reflog, const git_reference *ref)
 	git_buf log_file = GIT_BUF_INIT;
 	git_reflog *log = NULL;
 
-	*reflog = NULL;
-
 	assert(reflog && ref);
 
+	*reflog = NULL;
+
 	if (reflog_init(&log, ref) < 0)
 		return -1;