piketag module crashes on MacOS X

Imported from http://bugzilla.roxen.com/bugzilla/show_bug.cgi?id=3929

Reported by Fredrik Noring, Roxen Internet Software noring@roxen.com

According to self test on MacOS X:

Failed to compile module
/home/dist/tmp/self-test/roxen-4.0.349-test-cms-macosx_ppc32.sh/roxen/server-4.0.349/modules/scripting/piketag.pike:
modules/scripting/piketag.pike:197	Error: Index 'hide_whitespaces' not
present in module 'Pike'.
modules/scripting/piketag.pike:197	Error: Index 'tokenize' not present in
module 'Pike'.
modules/scripting/piketag.pike:202	Error: Index 'hide_whitespaces' not
present in module 'Pike'.
modules/scripting/piketag.pike:202	Error: Index 'tokenize' not present in
module 'Pike'.
modules/scripting/piketag.pike:234	Error: Undefined identifier RXML.
modules/scripting/piketag.pike:246	Error: Undefined identifier RXML.
modules/scripting/piketag.pike:260	Error: Undefined identifier Roxen.
modules/scripting/piketag.pike:291	Error: Class definition failed.
modules/scripting/piketag.pike:293	Error: Undefined identifier Roxen.
modules/scripting/piketag.pike:313	Error: Undefined identifier Parser.
modules/scripting/piketag.pike:313	Error: Undefined identifier Parser.