Fix possible memory leaks

src/async/audio/AsyncAudioDeviceAlsa.cpp

@@ -116,6 +116,7 @@ class AudioDeviceAlsa::AlsaWatch : public sigc::trackable
   
     ~AlsaWatch()
     {
+      activity.clear();
       std::list<FdWatch*>::const_iterator cii;
       for(cii = watch_list.begin(); cii != watch_list.end(); ++cii)
       {

src/async/core/AsyncTimer.cpp

@@ -10,7 +10,7 @@ class documentation.
 
 \verbatim
 Async - A library for programming event driven applications
-Copyright (C) 2003-2015 Tobias Blomberg
+Copyright (C) 2003-2022 Tobias Blomberg
 
 This program is free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -127,6 +127,7 @@ Timer::Timer(int timeout_ms, Type type, bool enabled)
 
 Timer::~Timer(void)
 {
+  expired.clear();
   setEnable(false);
 } /* Timer::~Timer */
 

src/valgrind.supp

@@ -110,3 +110,11 @@
    fun:Tcl_NewStringObj
    ...
 }
+{
+   TclCompileExpr
+   Memcheck:Leak
+   match-leak-kinds: possible
+   ...
+   fun:TclThreadAllocObj
+   ...
+}

src/versions

@@ -11,7 +11,7 @@ LIBECHOLIB=1.3.3.99.0
 LIBASYNC=1.6.99.17
 
 # SvxLink versions
-SVXLINK=1.7.99.58
+SVXLINK=1.7.99.59
 MODULE_HELP=1.0.0
 MODULE_PARROT=1.1.1
 MODULE_ECHO_LINK=1.5.99.2