Fix no-autopower and echo off for Icom

https://github.com/Hamlib/Hamlib/issues/885

rigs/icom/icom.c

@@ -943,7 +943,10 @@ icom_rig_open(RIG *rig)
 retry_open:
     retval_echo = icom_get_usb_echo_off(rig);
 
-    if (retval_echo == 0 || retval_echo == 1) // then we know our echo status
+    if (retval_echo == 0 || retval_echo == 1) { retval = RIG_OK; }
+    else { retval = retval_echo; }
+
+    if (retval == RIG_OK) // then we know our echo status
     {
         rig->state.current_vfo = icom_current_vfo(rig);
         // some rigs like the IC7100 still echo when in standby

rigs/icom/icom.h

@@ -30,7 +30,7 @@
 #include <sys/time.h>
 #endif
 
-#define BACKEND_VER "20211212"
+#define BACKEND_VER "20211213"
 
 #define ICOM_IS_SECONDARY_VFO(vfo) ((vfo) & (RIG_VFO_B | RIG_VFO_SUB | RIG_VFO_SUB_B | RIG_VFO_MAIN_B))
 #define ICOM_GET_VFO_NUMBER(vfo) (ICOM_IS_SECONDARY_VFO(vfo) ? 0x01 : 0x00)