UI: Fix sys. tray crashes when sys. tray not available

When the system tray is not available, the system tray variables would
still be used despite not being initialized.

Fixes mantis bug 640 on linux systems in particular that may not always
have system tray available.

UI/window-basic-main.cpp

@@ -3602,14 +3602,20 @@ void OBSBasic::StartStreaming()
 
 	ui->streamButton->setEnabled(false);
 	ui->streamButton->setText(QTStr("Basic.Main.Connecting"));
-	sysTrayStream->setEnabled(false);
-	sysTrayStream->setText(ui->streamButton->text());
+
+	if (sysTrayStream) {
+		sysTrayStream->setEnabled(false);
+		sysTrayStream->setText(ui->streamButton->text());
+	}
 
 	if (!outputHandler->StartStreaming(service)) {
 		ui->streamButton->setText(QTStr("Basic.Main.StartStreaming"));
 		ui->streamButton->setEnabled(true);
-		sysTrayStream->setText(ui->streamButton->text());
-		sysTrayStream->setEnabled(true);
+
+		if (sysTrayStream) {
+			sysTrayStream->setText(ui->streamButton->text());
+			sysTrayStream->setEnabled(true);
+		}
 	}
 
 	bool recordWhenStreaming = config_get_bool(GetGlobalConfig(),
@@ -3699,8 +3705,11 @@ void OBSBasic::StreamDelayStarting(int sec)
 {
 	ui->streamButton->setText(QTStr("Basic.Main.StopStreaming"));
 	ui->streamButton->setEnabled(true);
-	sysTrayStream->setText(ui->streamButton->text());
-	sysTrayStream->setEnabled(true);
+
+	if (sysTrayStream) {
+		sysTrayStream->setText(ui->streamButton->text());
+		sysTrayStream->setEnabled(true);
+	}
 
 	if (!startStreamMenu.isNull())
 		startStreamMenu->deleteLater();
@@ -3721,8 +3730,11 @@ void OBSBasic::StreamDelayStopping(int sec)
 {
 	ui->streamButton->setText(QTStr("Basic.Main.StartStreaming"));
 	ui->streamButton->setEnabled(true);
-	sysTrayStream->setText(ui->streamButton->text());
-	sysTrayStream->setEnabled(true);
+
+	if (sysTrayStream) {
+		sysTrayStream->setText(ui->streamButton->text());
+		sysTrayStream->setEnabled(true);
+	}
 
 	if (!startStreamMenu.isNull())
 		startStreamMenu->deleteLater();
@@ -3742,8 +3754,11 @@ void OBSBasic::StreamingStart()
 	ui->streamButton->setText(QTStr("Basic.Main.StopStreaming"));
 	ui->streamButton->setEnabled(true);
 	ui->statusbar->StreamStarted(outputHandler->streamOutput);
-	sysTrayStream->setText(ui->streamButton->text());
-	sysTrayStream->setEnabled(true);
+
+	if (sysTrayStream) {
+		sysTrayStream->setText(ui->streamButton->text());
+		sysTrayStream->setEnabled(true);
+	}
 
 	if (api)
 		api->on_event(OBS_FRONTEND_EVENT_STREAMING_STARTED);
@@ -3756,7 +3771,9 @@ void OBSBasic::StreamingStart()
 void OBSBasic::StreamStopping()
 {
 	ui->streamButton->setText(QTStr("Basic.Main.StoppingStreaming"));
-	sysTrayStream->setText(ui->streamButton->text());
+
+	if (sysTrayStream)
+		sysTrayStream->setText(ui->streamButton->text());
 
 	streamingStopping = true;
 	if (api)
@@ -3795,8 +3812,11 @@ void OBSBasic::StreamingStop(int code)
 
 	ui->streamButton->setText(QTStr("Basic.Main.StartStreaming"));
 	ui->streamButton->setEnabled(true);
-	sysTrayStream->setText(ui->streamButton->text());
-	sysTrayStream->setEnabled(true);
+
+	if (sysTrayStream) {
+		sysTrayStream->setText(ui->streamButton->text());
+		sysTrayStream->setEnabled(true);
+	}
 
 	streamingStopping = false;
 	if (api)
@@ -3836,7 +3856,9 @@ void OBSBasic::StartRecording()
 void OBSBasic::RecordStopping()
 {
 	ui->recordButton->setText(QTStr("Basic.Main.StoppingRecording"));
-	sysTrayRecord->setText(ui->recordButton->text());
+
+	if (sysTrayRecord)
+		sysTrayRecord->setText(ui->recordButton->text());
 
 	recordingStopping = true;
 	if (api)
@@ -3857,7 +3879,9 @@ void OBSBasic::RecordingStart()
 {
 	ui->statusbar->RecordingStarted(outputHandler->fileOutput);
 	ui->recordButton->setText(QTStr("Basic.Main.StopRecording"));
-	sysTrayRecord->setText(ui->recordButton->text());
+
+	if (sysTrayRecord)
+		sysTrayRecord->setText(ui->recordButton->text());
 
 	recordingStopping = false;
 	if (api)
@@ -3872,7 +3896,9 @@ void OBSBasic::RecordingStop(int code)
 {
 	ui->statusbar->RecordingStopped();
 	ui->recordButton->setText(QTStr("Basic.Main.StartRecording"));
-	sysTrayRecord->setText(ui->recordButton->text());
+
+	if (sysTrayRecord)
+		sysTrayRecord->setText(ui->recordButton->text());
 	blog(LOG_INFO, RECORDING_STOP);
 
 	if (code == OBS_OUTPUT_UNSUPPORTED && isVisible()) {