Add check for Audiostar in meade.c to provide arcminutes on elevation limit

https://github.com/Hamlib/Hamlib/issues/266

rotators/meade/meade.c

@@ -230,7 +230,14 @@ static int meade_open(ROT *rot)
 
     /* Set Telescope to Land alignment mode to deactivate sloping */
     /* Allow 0-90 Degree Elevation */
-    retval = meade_transaction(rot, ":AL#:So00#:Sh90#", NULL, 0, 0);
+    if (strcmp(priv->product_name, "Audiostar"))  // if we're not an audiostar
+    {
+        retval = meade_transaction(rot, ":AL#:So00#:Sh90#", NULL, 0, 0);
+    }
+    {
+        // Audiostar elevation is in arcminutes
+        retval = meade_transaction(rot, ":So00#:Sh5400#", NULL, 0, 0);
+    }
 
     if (retval != RIG_OK) { rig_debug(RIG_DEBUG_ERR, "%s: meade_transaction %s\n", __func__, rigerror(retval)); }
 
@@ -299,6 +306,7 @@ static int meade_set_position(ROT *rot, azimuth_t az, elevation_t el)
     meade_transaction(rot, cmd_str, return_str, &return_str_size, 3);
 
     /* '1' == Azimuth accepted '1' == Elevation accepted '0' == No error */
+    /* MA command may return 1=Lower than or 2=Higher than min/max elevation */
     if (return_str_size > 0 && strstr(return_str, "110") != NULL)
     {
         return RIG_OK;