PKG: use system GTK out of the box with linux standalone package

Documentation/Cookbook/rst/Installation_Linux.txt

@@ -94,9 +94,9 @@ Q: Monteverdi and Mapla applications look different from my other applications.
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 A: By default, Monteverdi, Mapla and otbapplication (otbgui\_\*) uses a the
-system gtk theme. If you can't install GTK on your system you can use
+system gtk theme. If you can't install GTK on your system you can use the
 distributed with the OTB package. Note that using system GTK is the preferred
-way with the OTB standalone package. Using the distributed version of GTK do not
+way with the OTB standalone package as the distributed version of GTK do not
 work on recent Linux distributions. 
 
 To use the distributed GTK libraries you need to set the OTB_USE_LOCAL_GTK:

SuperBuild/Packaging/Files/linux_pkgsetup.in

@@ -73,12 +73,12 @@ cat > "$OUT_DIR/otbenv.profile" << EOF
 # unset any existing LD_LIBRARY_PATH
 unset LD_LIBRARY_PATH
 
-# if OTB_USE_LOCAL_GTK is not set or is set to one,
+# if OTB_USE_LOCAL_GTK is set to one,
 # we must include <OUT_DIR>/lib/gtk because glib files are
 # installed there. 
 
-# OTB_USE_LOCAL_GTK is not set by default
-if [ -z "\$OTB_USE_LOCAL_GTK" ] || [ "\$OTB_USE_LOCAL_GTK" = "1" ]; then
+# OTB_USE_LOCAL_GTK is not set by default (use GTK system)
+if [ "\$OTB_USE_LOCAL_GTK" = "1" ]; then
   LD_LIBRARY_PATH=$OUT_DIR/lib/gtk
   export LD_LIBRARY_PATH
 fi