Fixes after comments from last push:

- Removed some not needed casts
- Change plugin.h to be 'binary compatible' with old versions
- Added mysql_ft_size_t typedef to plugin.h to make it trivial to change string lengths to size_t on next ABI change
- Made some fixes suggested by Kristian to make things more portable and future safe (when it comes to strict aliasing)

include/ft_global.h:
  Introduced FT_WEIGTH, to handle fulltext weights in a slightly more portable manner
include/mysql/plugin.h:
  Change plugin.h to be 'binary compatible' with old versions
  Added mysql_ft_size_t typedef to plugin.h to make it trivial to change string lengths to size_t on next ABI change
  Changed flags to unsigned (as flags should always be unsigned)
mysql-test/t/information_schema.test:
  Fixed typo
sql/sp_head.cc:
  Removed cast
sql/sql_select.cc:
  Removed cast
sql/table.cc:
  Removed cast
storage/maria/ma_ft_boolean_search.c:
  Use mysql_ft_size_t instead of size_t for plugin.h code
  Changed some other string lengths to size_t
storage/maria/ma_ft_nlq_search.c:
  Use FT_WEIGTH to make code more portable
storage/maria/ma_ft_parser.c:
  Use mysql_ft_size_t instead of size_t for plugin.h code
  Changed some other string lengths to size_t
storage/maria/ma_ftdefs.h:
  Changed some string lengths to size_t
storage/maria/maria_ftdump.c:
  Use FT_WEIGTH to make code more portable
storage/myisam/ft_boolean_search.c:
  Use mysql_ft_size_t instead of size_t for plugin.h code
storage/myisam/ft_nlq_search.c:
  Use FT_WEIGTH to make code more portable
storage/myisam/ft_parser.c:
  Use mysql_ft_size_t instead of size_t for plugin.h code
storage/myisam/myisam_ftdump.c:
  Use FT_WEIGTH to make code more portable

3 files changed, 16 insertions, 10 deletions

diff --git a/include/ft_global.h b/include/ft_global.h
index dba8a6e75e5..8fe5ee5c42e 100644
--- a/include/ft_global.h
+++ b/include/ft_global.h
@@ -76,6 +76,8 @@ my_bool ft_boolean_check_syntax_string(const uchar *);
 
 extern const HA_KEYSEG ft_keysegs[FT_SEGS];
 
+typedef union {int32 i; float f;} FT_WEIGTH;
+
 #ifdef  __cplusplus
 }
 #endif
diff --git a/include/mysql/plugin.h b/include/mysql/plugin.h
index 91e8a80b408..b33f5970110 100644
--- a/include/mysql/plugin.h
+++ b/include/mysql/plugin.h
@@ -564,19 +564,22 @@ typedef struct st_mysql_ftparser_boolean_info
   nothing.  See  enum_ftparser_mode above.
 */
 
+/* TODO: Change the following int to size_t at next ABI update */
+typedef int mysql_ft_size_t;
+
 typedef struct st_mysql_ftparser_param
 {
   int (*mysql_parse)(struct st_mysql_ftparser_param *,
-                     const unsigned char *doc, size_t doc_len);
+                     const unsigned char *doc, mysql_ft_size_t doc_len);
   int (*mysql_add_word)(struct st_mysql_ftparser_param *,
-                        const unsigned char *word, size_t word_len,
+                        const unsigned char *word, mysql_ft_size_t word_len,
                         MYSQL_FTPARSER_BOOLEAN_INFO *boolean_info);
   void *ftparser_state;
   void *mysql_ftparam;
   struct charset_info_st *cs;
-  char *doc;
-  int length;
-  int flags;
+  const unsigned char *doc;
+  mysql_ft_size_t length;
+  unsigned int flags;
   enum enum_ftparser_mode mode;
 } MYSQL_FTPARSER_PARAM;
 
diff --git a/include/mysql/plugin.h.pp b/include/mysql/plugin.h.pp
index 22b1f647736..2f44870b479 100644
--- a/include/mysql/plugin.h.pp
+++ b/include/mysql/plugin.h.pp
@@ -70,19 +70,20 @@ typedef struct st_mysql_ftparser_boolean_info
   char prev;
   char *quot;
 } MYSQL_FTPARSER_BOOLEAN_INFO;
+typedef int mysql_ft_size_t;
 typedef struct st_mysql_ftparser_param
 {
   int (*mysql_parse)(struct st_mysql_ftparser_param *,
-                     const unsigned char *doc, size_t doc_len);
+                     const unsigned char *doc, mysql_ft_size_t doc_len);
   int (*mysql_add_word)(struct st_mysql_ftparser_param *,
-                        const unsigned char *word, size_t word_len,
+                        const unsigned char *word, mysql_ft_size_t word_len,
                         MYSQL_FTPARSER_BOOLEAN_INFO *boolean_info);
   void *ftparser_state;
   void *mysql_ftparam;
   struct charset_info_st *cs;
-  char *doc;
-  int length;
-  int flags;
+  const unsigned char *doc;
+  mysql_ft_size_t length;
+  unsigned int flags;
   enum enum_ftparser_mode mode;
 } MYSQL_FTPARSER_PARAM;
 struct st_mysql_ftparser