fixed typo on wallet schema

res/schema.sql

@@ -7,8 +7,8 @@ CREATE TABLE IF NOT EXISTS keys(
 );
 CREATE INDEX IF NOT EXISTS key_public on keys(key_public);
 CREATE TABLE IF NOT EXISTS coins(
-    coin BLOB NOT NULL
-    witness BLOB NOT NULL
+    coin BLOB NOT NULL,
+    witness BLOB NOT NULL,
     serial BLOB NOT NULL,
     value INT NOT NULL,
     coin_blind BLOB NOT NULL,