ssb: Size blob ID buffers appropriately.

src/ssb.export.c

@@ -90,7 +90,7 @@ void tf_ssb_export(tf_ssb_t* ssb, const char* key)
 		return;
 	}
 
-	char app_blob_id[64] = { 0 };
+	char app_blob_id[k_blob_id_len] = { 0 };
 	sqlite3* db = tf_ssb_acquire_db_reader(ssb);
 	sqlite3_busy_timeout(db, 10000);
 	sqlite3_stmt* statement;