This fixes the QA issue of the .desktop file

Bug: https://bugs.gentoo.org/740024

Signed-off-by: Pascal Jäger <pascal.jaeger@leimstift.de>

--- a/rotoscope.desktop
+++ b/rotoscope.desktop
@@ -2,7 +2,7 @@
 Name=Rotoscope
 Comment=Turn photos into cartoons
 Exec=rotoscope
-Icon=rotoscope.png
-Terminal=0
+Icon=rotoscope
+Terminal=false
 Type=Application
-Categories=Application;Graphics;2DGraphics;RasterGraphics;GTK;
+Categories=Graphics;2DGraphics;RasterGraphics;GTK;