Fix exec icon location and bring it into XDG compliance

diff --git a/src/torkview.cpp b/src/torkview.cpp
index bf5ebcc..c7a0d50 100644
--- a/src/torkview.cpp
+++ b/src/torkview.cpp
@@ -1118,7 +1118,7 @@
     
     TQString prog = TDEGlobal::iconLoader()->iconPath(program, TDEIcon::Small, true);
     if (prog.isEmpty())
-        return SmallIcon( "exec" );
+        return SmallIcon( "application-x-executable" );
     else
         return SmallIcon( program );