RemotePlugin: improved management of shared memory keys

include/RemotePlugin.h

@@ -1101,13 +1101,15 @@ void RemotePluginClient::setShmKey( key_t _key, int _size )
 {
 #ifdef USE_QT_SHMEM
 	m_shmObj.setKey( QString::number( _key ) );
-	if( m_shmObj.attach() )
+	if( m_shmObj.attach() || m_shmObj.error() == QSharedMemory::NoError )
 	{
 		m_shm = (float *) m_shmObj.data();
 	}
 	else
 	{
-		debugMessage( "failed getting shared memory\n" );
+		char buf[64];
+		sprintf( buf, "failed getting shared memory: %d\n", m_shmObj.error() );
+		debugMessage( buf );
 	}
 #else
 	if( m_shm != NULL )

src/core/RemotePlugin.cpp

@@ -314,7 +314,7 @@ void RemotePlugin::resizeSharedProcessingMemory()
 #endif
 	}
 
-	int shm_key = 0;
+	static int shm_key = 0;
 #ifdef USE_QT_SHMEM
 	do
 	{