Unlock the sshare_lock in submit_work_thread when all references to work and sshare are complete.

cgminer.c

@@ -3160,13 +3160,12 @@ static void *submit_work_thread(void *userdata)
 		/* Give the stratum share a unique id */
 		sshare->id = swork_id++;
 		HASH_ADD_INT(stratum_shares, id, sshare);
-		mutex_unlock(&sshare_lock);
-
 		nonce = *((uint32_t *)(work->data + 76));
 		noncehex = bin2hex((const unsigned char *)&nonce, 4);
 		memset(s, 0, 1024);
 		sprintf(s, "{\"params\": [\"%s\", \"%s\", \"%s\", \"%s\", \"%s\"], \"id\": %d, \"method\": \"mining.submit\"}",
 			pool->rpc_user, work->job_id, work->nonce2, work->ntime, noncehex, sshare->id);
+		mutex_unlock(&sshare_lock);
 		free(noncehex);
 
 		applog(LOG_INFO, "Submitting share %08lx to pool %d", (unsigned long)(hash32[6]), pool->pool_no);