Fix x25cmdfails detection in icom.c

https://github.com/Hamlib/Hamlib/issues/1277#issuecomment-1542655090

rigs/icom/icom.c

@@ -1629,7 +1629,7 @@ int icom_get_freq(RIG *rig, vfo_t vfo, freq_t *freq)
 
     // we'll use 0x25 command to get unselected frequency
     // we have to assume current_vfo is accurate to determine what "other" means
-    if (priv->x25cmdfails == 0)
+    if (priv->x25cmdfails <= 0)
     {
         int cmd2 = 0x25;
         int subcmd2 = 0x00;

rigs/icom/icom.h

@@ -35,7 +35,7 @@
 #include <sys/time.h>
 #endif
 
-#define BACKEND_VER "20230508"
+#define BACKEND_VER "20230510"
 
 #define ICOM_IS_ID31 rig_is_model(rig, RIG_MODEL_ID31)
 #define ICOM_IS_ID51 rig_is_model(rig, RIG_MODEL_ID51)