Bug#24248 Problem updating from 5.0.15 to 5.1.12 running under Win XP SP2

 - Fix error message to say that "mysql_upgrade" should be run when
 a particular error message is found to be missing
 - Dont's set default value on blob's - it will not be used anyway.


scripts/mysql_system_tables_fix.sql:
  Don't set a DEFAULT value on blob - depending on sql_mode it
  will either be dicarded or throw an error message. But never used.
sql/sql_plugin.cc:
  Update error message to indicate that "mysql_upgrade" should
  be used to correct the problem
sql/sql_udf.cc:
  Update error message to indicate that "mysql_upgrade" should
  be used to correct the problem

scripts/mysql_system_tables_fix.sql

@@ -343,7 +343,7 @@ ALTER TABLE proc MODIFY name char(64) DEFAULT '' NOT NULL,
                              'READS_SQL_DATA',
                              'MODIFIES_SQL_DATA'
                             ) DEFAULT 'CONTAINS_SQL' NOT NULL,
-                 MODIFY body longblob DEFAULT '' NOT NULL,
+                 MODIFY body longblob NOT NULL,
                  MODIFY sql_mode
                         set('REAL_AS_FLOAT',
                             'PIPES_AS_CONCAT',

sql/sql_plugin.cc

@@ -778,7 +778,8 @@ void plugin_load(void)
   if (simple_open_n_lock_tables(new_thd, &tables))
   {
     DBUG_PRINT("error",("Can't open plugin table"));
-    sql_print_error("Can't open the mysql.plugin table. Please run the mysql_upgrade script to create it.");
+    sql_print_error("Can't open the mysql.plugin table. Please "
+                    "run mysql_upgrade to create it.");
     goto end;
   }
   table= tables.table;

sql/sql_udf.cc

@@ -145,7 +145,8 @@ void udf_init()
   if (simple_open_n_lock_tables(new_thd, &tables))
   {
     DBUG_PRINT("error",("Can't open udf table"));
-    sql_print_error("Can't open the mysql.func table. Please run the mysql_upgrade script to create it.");
+    sql_print_error("Can't open the mysql.func table. Please "
+                    "run mysql_upgrade to create it.");
     goto end;
   }