Fixed bug in new code for regexp LIKE NULL


BUILD/SETUP.sh:
  Fixes for gcc 3.1
BUILD/compile-solaris-sparc-debug:
  Fixes for gcc 3.1
BUILD/compile-solaris-sparc-purify:
  Fixes for gcc 3.1
BUILD/compile-solaris-sparc:
  Fixes for gcc 3.1
Docs/manual.texi:
  Fixed typo
include/violite.h:
  Fixes for gcc 3.1
mysql-test/r/func_concat.result:
  Updated test results
sql/item_cmpfunc.cc:
  Fixed bug in new code for regexp LIKE NULL