[blam] Fix warning from desktop-file-validate

[Carlos Martín Nieto <cmartin src gnome org>]

commit 6dc77628d9383a4eb9975a5ba476cf823a46b28f
Author: Carlos Martín Nieto <cmn dwim me>
Date:   Fri Jun 21 13:52:37 2013 +0200

    Fix warning from desktop-file-validate

 blam.desktop.in.in |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/blam.desktop.in.in b/blam.desktop.in.in
index 67b018b..7f6ae10 100644
--- a/blam.desktop.in.in
+++ b/blam.desktop.in.in
@@ -3,11 +3,11 @@ Version=1.0
 _Name=Blam Feed Reader
 _Comment=Feed reader
 Exec=blam
-Icon=blam.png
+Icon=blam
 StartupNotify=true
 Terminal=false
 Type=Application
-Categories=Application;Network;
+Categories=Network;
 X-GNOME-Bugzilla-Bugzilla=GNOME
 X-GNOME-Bugzilla-Product=blam
 X-GNOME-Bugzilla-Component=General