only indent world builder include files.

Author: MFraters

doc/indent

@@ -5,7 +5,7 @@
 # World Builder, the same indenting program (astyle) and version (2.04) is used
 # to indent the files of the World Builder.
 
-if test ! -d source -o ! -d include ; then
+if test ! -d source -o ! -d include/world_builder -d include/visualization -d include/app ; then
   echo "Error: The indenting script must be run from the top level directory of the World Builder."
   exit
 fi