[nop] Bring back private write-str-sm

Hadn't actually intended to remove this

src/taoensso/nippy.clj

@@ -726,6 +726,7 @@
 (defn- write-biginteger [out ^BigInteger n] (write-bytes-lg out (.toByteArray n)))
 
 (defn- write-str-sm* [^DataOutput out ^String s] (write-bytes-sm* out (.getBytes s StandardCharsets/UTF_8)))
+(defn- write-str-sm  [^DataOutput out ^String s] (write-bytes-sm  out (.getBytes s StandardCharsets/UTF_8)))
 (defn- write-str-md  [^DataOutput out ^String s] (write-bytes-md  out (.getBytes s StandardCharsets/UTF_8)))
 (defn- write-str-lg  [^DataOutput out ^String s] (write-bytes-lg  out (.getBytes s StandardCharsets/UTF_8)))
 (defn- write-str     [^DataOutput out ^String s]