Fixes errors reported by desktop-file-validate.

--- a/src/qt-recordmydesktop.desktop
+++ b/src/qt-recordmydesktop.desktop
@@ -1,12 +1,11 @@
 [Desktop Entry]
 Version=1.0
-Encoding=UTF-8
 Name=qt-recordMyDesktop
 Comment=Frontend for recordMyDesktop
 Comment[fr]=Interface pour recordmydesktop
 Exec=qt-recordMyDesktop
 Terminal=false
 Type=Application
-Icon=qt-recordmydesktop.png
+Icon=qt-recordmydesktop
 Categories=AudioVideo;Recorder;
 StartupNotify=false