Again fixed some compiler warnings.

lib/sdo_request.c

@@ -37,6 +37,7 @@
 #include <stdio.h>
 #include <errno.h>
 #include <string.h>
+#include <sys/ioctl.h>
 
 #include "sdo_request.h"
 #include "master/ioctl.h"

lib/slave_config.c

@@ -70,7 +70,6 @@ int ecrt_slave_config_sync_manager(ec_slave_config_t *sc, uint8_t sync_index,
         ec_direction_t dir, ec_watchdog_mode_t watchdog_mode)
 {
     ec_ioctl_config_t data;
-    unsigned int i;
 
     if (sync_index >= EC_MAX_SYNC_MANAGERS)
         return -ENOENT;
@@ -473,7 +472,6 @@ ec_voe_handler_t *ecrt_slave_config_create_voe_handler(ec_slave_config_t *sc,
 {
     ec_ioctl_voe_t data;
     ec_voe_handler_t *voe;
-    unsigned int index;
 
     voe = malloc(sizeof(ec_voe_handler_t));
     if (!voe) {