Fixed Ctrl+c shutdown function on windows, followup r15706. (bugreport:5495)

git-svn-id: https://svn.code.sf.net/p/rathena/svn/trunk@15790 54d463be-8e91-2dee-dedb-b68131a5f0ec

src/common/core.c

@@ -87,7 +87,7 @@ static BOOL WINAPI console_handler(DWORD c_event)
 			runflag = CORE_ST_STOP;// auto-shutdown
         break;
 	default:
-		break;
+		return FALSE;
     }
     return TRUE;
 }