pidgin/pidgin

Fix a crash on shutdown in kwallet if the wallet was never opened.

2021-03-23, Gary Kramlich
a6a5e36ddfe5
Fix a crash on shutdown in kwallet if the wallet was never opened.

The wallet instance variable was not initialized so if the wallet was never opened we were trying to delete and invalid pointer.

Also update the dispose method of the provider to close the wallet as the
tasks in the queue hold a reference to the provider instance as the source
object in their tasks.

Testing Done:
Ran locally with both the kwallet and secret service providers.

Reviewed at https://reviews.imfreedom.org/r/581/
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<chapter id="chapter-signals-protocol">
<title>Protocol signals</title>
<refsect1 id="protocols.signals" role="signal_proto">
<title role="signal_proto.title">List of signals</title>
<synopsis>
&quot;<link linkend="protocols-protocol-added">protocol-added</link>&quot;
&quot;<link linkend="protocols-protocol-removed">protocol-removed</link>&quot;
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<title role="signals.title">Signal details</title>
<refsect2 id="protocols-protocol-added" role="signal">
<title>The <literal>&quot;protocol-added&quot;</literal> signal</title>
<programlisting>
void user_function (PurpleProtocol *protocol,
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Emitted when a protocol is added.
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<variablelist role="params">
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<term><parameter>protocol</parameter>&#160;:</term>
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<title>The <literal>&quot;protocol-removed&quot;</literal> signal</title>
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void user_function (PurpleProtocol *protocol,
gpointer user_data)
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<para>
Emitted when a protocol is removed.
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<variablelist role="params">
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<term><parameter>protocol</parameter>&#160;:</term>
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