nostrdb: cleanup previous patch

I wanted to not amend this since we've already applied
it in the nostrdb-update branch on damus and I don't want
to conflict

Signed-off-by: William Casarin <jb55@jb55.com>

nostrdb/src/nostrdb.c

@@ -7081,6 +7081,7 @@ static struct ndb_blocks *ndb_note_to_blocks(struct ndb_note *note)
 	const char *content;
 	size_t content_len;
 	struct ndb_blocks *blocks;
+	unsigned char *buffer;
 
 	content = ndb_note_content(note);
 	content_len = ndb_note_content_length(note);
@@ -7089,7 +7090,7 @@ static struct ndb_blocks *ndb_note_to_blocks(struct ndb_note *note)
 	if (content_len >= INT32_MAX)
 		return NULL;
 
-    unsigned char *buffer = malloc(2<<18);  // Not carefully calculated, but ok because we will not need this once we switch to the local relay model
+	buffer = malloc(2<<18);  // Not carefully calculated, but ok because we will not need this once we switch to the local relay model
 	if (!buffer)
 		return NULL;