Clean up cppcheck warning

rigs/tentec/tentec2.c

@@ -699,6 +699,7 @@ const char *tentec2_get_info(RIG *rig)
     /*
      * protocol version
      */
+    buf[0] = 0;
     firmware_len = 100;
     retval = tentec_transaction(rig, "?V\r", 3, buf, &firmware_len);
 
@@ -710,14 +711,5 @@ const char *tentec2_get_info(RIG *rig)
         return NULL;
     }
 
-    if (firmware_len < 100)
-    {
-        buf[firmware_len] = 0;
-    }
-    else
-    {
-        buf[0] = 0;
-    }
-
     return buf;
 }