Fix Coverity Scan 1486934 Unchecked return value

plugins/persist-sqlite/clients.c

@@ -81,21 +81,26 @@ int persist_sqlite__client_remove_cb(int event, void *event_data, void *userdata
 				ed->client_id, (int)strlen(ed->client_id), SQLITE_STATIC) == SQLITE_OK){
 
 		ms->event_count++;
-		sqlite3_step(ms->subscription_clear_stmt);
+		rc = sqlite3_step(ms->subscription_clear_stmt);
 		sqlite3_reset(ms->subscription_clear_stmt);
+		if(rc == SQLITE_DONE){
+			rc = MOSQ_ERR_SUCCESS;
+		}else{
+			rc = MOSQ_ERR_UNKNOWN;
+		}
 	}
 	if(sqlite3_bind_text(ms->client_remove_stmt, 1,
 				ed->client_id, (int)strlen(ed->client_id), SQLITE_STATIC) == SQLITE_OK){
 
 		ms->event_count++;
 		rc = sqlite3_step(ms->client_remove_stmt);
+		sqlite3_reset(ms->client_remove_stmt);
 		if(rc == SQLITE_DONE){
 			rc = MOSQ_ERR_SUCCESS;
 		}else{
 			rc = MOSQ_ERR_UNKNOWN;
 		}
 	}
-	sqlite3_reset(ms->client_remove_stmt);
 
 	return rc;
 }