to improved safe

inc/hgl/io/event/MouseEvent.h

@@ -56,6 +56,8 @@ namespace hgl
 
             MouseEvent():InputEvent(InputEventSource::Mouse)
             {
+                med=nullptr;
+                x=y=0;
                 hgl_zero(pressed_statues);
             }
             virtual ~MouseEvent()=default;

inc/hgl/thread/RingBuffer.h

@@ -309,6 +309,8 @@ namespace hgl
         RingBufferSafeWrite(io::RingOutputStream *ros)
         {
             rb=ros->GetRingBuffer();
+
+            size=-1;
         }
 
         int Start()

inc/hgl/type/Map.cpp

@@ -194,6 +194,7 @@ namespace hgl
 
         KVData *obj=GetListObject(data_list,index);
 
+        if(!obj)return(nullptr);
         return &(obj->value);
     }