CScanTs: add destructor to avoid leaks

Origin commit data
------------------
Commit: 14783a7581
Author: Stefan Seyfried <seife@tuxbox-git.slipkontur.de>
Date: 2013-04-06 (Sat, 06 Apr 2013)

src/gui/scan.cpp

@@ -79,6 +79,12 @@ CScanTs::CScanTs()
 	snrscale->setBlink();
 }
 
+CScanTs::~CScanTs()
+{
+	delete sigscale;
+	delete snrscale;
+}
+
 void CScanTs::prev_next_TP( bool up)
 {
 	t_satellite_position position = 0;