RemoteVstPlugin: reset m_inputs and m_outputs in updateInOutCount()

Reset m_inputs and m_outputs to NULL after deleting the memory they're
pointing to. Fixes possible crash if new input or output count is 0
and the count changes again later.

Signed-off-by: Tobias Doerffel <tobias.doerffel@gmail.com>
(cherry picked from commit 206d906c10)

plugins/vst_base/remote_vst_plugin.cpp

@@ -885,6 +885,9 @@ void RemoteVstPlugin::updateInOutCount()
 	delete[] m_inputs;
 	delete[] m_outputs;
 
+	m_inputs = NULL;
+	m_outputs = NULL;
+
 	setInputCount( inputCount() );
 	setOutputCount( outputCount() );