Also added mysql-test files:
 include/is_debug_build.inc
 r/is_debug_build.require
 r/sp-code.result
 t/sp-code.test


sql/sp_head.cc:
  Review fixes:
  - Some minor editorial changes
  - Fixed all print() methods for instructions:
    - reserve() enough space
    - check return value from reserve()
    - use qs_append, with length arg, whenever possible
sql/sp_pcontext.cc:
  Review fixes.
  Also fixed bug in find_cursor().
sql/sp_pcontext.h:
  Changed parameter names (review fix).
sql/sql_parse.cc:
  Moved comment. (Review fix)
mysql-test/include/is_debug_build.inc:
  New BitKeeper file ``mysql-test/include/is_debug_build.inc''
mysql-test/r/is_debug_build.require:
  New BitKeeper file ``mysql-test/r/is_debug_build.require''
mysql-test/r/sp-code.result:
  New BitKeeper file ``mysql-test/r/sp-code.result''
mysql-test/t/sp-code.test:
  New BitKeeper file ``mysql-test/t/sp-code.test''