fix memory leak in picolcd driver (Nicu Pavel)

server/drivers/picolcd.c

@@ -535,6 +535,7 @@ MODULE_EXPORT char *picoLCD_get_key(Driver *drvthis) {
 		} else {
 			debug(RPT_DEBUG, "picolcd: get_key got non-key data or timeout");
 			/* We got IR or otherwise bad data */
+			free(keydata);
 			return NULL;
 		}