Change sprintf_ant to print ant names instead of numbers

tests/sprintflst.c

@@ -99,6 +99,7 @@ int sprintf_mode(char *str, rmode_t mode)
 int sprintf_ant(char *str, ant_t ant)
 {
     int i, len = 0;
+    char *ant_name;
 
     *str = '\0';
 
@@ -111,7 +112,19 @@ int sprintf_ant(char *str, ant_t ant)
     {
         if (ant & (1UL << i))
         {
-            len += sprintf(str + len, "%d ", i + 1);
+            switch(i) {
+                case 0: ant_name = "ANT1";break;
+                case 1: ant_name = "ANT2";break;
+                case 2: ant_name = "ANT3";break;
+                case 3: ant_name = "ANT4";break;
+                case 4: ant_name = "ANT5";break;
+                case 31: ant_name = "ANT_CURR";break;
+                default: 
+                    ant_name = "ANT_UNK";
+                    rig_debug(RIG_DEBUG_ERR,"%s: unknown ant=%d\n", __func__, i);
+                    break;
+            }
+            len += sprintf(str + len, "%s ", ant_name);
         }
     }