Fixed two minor issues in bx_param_num_c class.

- reset() must call set() to ensure the set handler is called if present.
- don't set value if parameter is disabled.

bochs/gui/paramtree.cc

@@ -231,6 +231,8 @@ Bit64s bx_param_num_c::get64()
 
 void bx_param_num_c::set(Bit64s newval)
 {
+  if (!enabled) return;
+
   if (handler) {
     // the handler can override the new value and/or perform some side effect
     val.number = (*handler)(this, 1, newval);

bochs/gui/paramtree.h

@@ -211,7 +211,7 @@ public:
       const char *description,
       Bit64s min, Bit64s max, Bit64s initial_val,
       bool is_shadow = 0);
-  virtual void reset() { val.number = initial_val; }
+  virtual void reset() { set(initial_val); }
   void set_handler(param_event_handler handler);
   void set_sr_handlers(void *devptr, param_save_handler save, param_restore_handler restore);
   void set_enable_handler(param_enable_handler handler) { enable_handler = handler; }