From 68f1ca16a1415c192e2d767fa39fd16962c78a83 Mon Sep 17 00:00:00 2001
From: Teuniz <teuniz@gmail.com>
Date: Sat, 9 Jan 2016 16:31:49 +0100
Subject: [PATCH]  Work in progress.

---
 global.h        | 2 +-
 mainwindow.cpp  | 4 ++++
 signalcurve.cpp | 7 ++++++-
 3 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/global.h b/global.h
index 820c5a2..799509b 100644
--- a/global.h
+++ b/global.h
@@ -35,7 +35,7 @@
 
 
 #define PROGRAM_NAME          "DSRemote"
-#define PROGRAM_VERSION       "0.32_1601091517"
+#define PROGRAM_VERSION       "0.32_1601091631"
 
 #define MAX_PATHLEN            4096
 
diff --git a/mainwindow.cpp b/mainwindow.cpp
index d4dccd3..6f6c81b 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -466,6 +466,10 @@ void UI_Mainwindow::close_connection()
 
   scrn_thread->set_device(NULL);
 
+  devparms.math_fft = 0;
+
+  devparms.math_fft_split = 0;
+
   waveForm->clear();
 
   tmc_close();
diff --git a/signalcurve.cpp b/signalcurve.cpp
index 3a69b1a..89a78b2 100644
--- a/signalcurve.cpp
+++ b/signalcurve.cpp
@@ -734,7 +734,12 @@ void SignalCurve::drawFFT(QPainter *painter, int curve_h_b, int curve_w_b)
 
 /////////////////////////////////// FFT: draw the curve ///////////////////////////////////////////
 
-  if((devparms->fftbufsz > 32) && devparms->chandisplay[devparms->math_fft_src] && (bufsize > 32))
+  if(bufsize < 32)
+  {
+    return;
+  }
+
+  if((devparms->fftbufsz > 32) && devparms->chandisplay[devparms->math_fft_src])
   {
     painter->setClipping(true);
     painter->setClipRegion(QRegion(0, 0, curve_w, curve_h), Qt::ReplaceClip);