If -RIG_ENTARGET returns from set_freq it will be ignored

This will covers rigs that cannot set freq while transmitting like the FTDX3000 and FTDX5000
https://github.com/Hamlib/Hamlib/issues/906

rigs/yaesu/newcat.c

@@ -834,7 +834,7 @@ int newcat_set_freq(RIG *rig, vfo_t vfo, freq_t freq)
         }
         while (err == RIG_OK && ptt == RIG_PTT_ON && retry-- > 0);
 
-        if (ptt) { return RIG_ENTARGET; }
+        if (ptt) { return -RIG_ENTARGET; }
     }
 
     if (RIG_MODEL_FT450 == caps->rig_model)

rigs/yaesu/newcat.h

@@ -50,7 +50,7 @@
 typedef char ncboolean;
 
 /* shared function version */
-#define NEWCAT_VER "20211216"
+#define NEWCAT_VER "20211227"
 
 /* Hopefully large enough for future use, 128 chars plus '\0' */
 #define NEWCAT_DATA_LEN                 129

src/rig.c

@@ -1526,6 +1526,9 @@ int HAMLIB_API rig_set_freq(RIG *rig, vfo_t vfo, freq_t freq)
             TRACE;
             retcode = caps->set_freq(rig, vfo, freq);
 
+            // some rig will return -RIG_ENTARGET if cannot set ptt while transmitting
+            // we will just return RIG_OK and the frequency set will be ignored
+            if (retcode == -RIG_ENTARGET) RETURNFUNC(RIG_OK);
             if (retcode != RIG_OK) { RETURNFUNC(retcode); }
 
             rig_set_cache_freq(rig, vfo, (freq_t)0);