Fixes during review of new code

- Mostly indentation fixes
- Added missing test
- Ensure that Item_func_case() checks for stack overruns
- Use real_item() instead of (Item_ref*) item
- Fixed wrong error handling


myisam/mi_unique.c:
  Improved comments
myisam/myisampack.c:
  Updated version number
mysql-test/r/group_by.result:
  Added test that was lost during earlier merge
mysql-test/r/information_schema.result:
  Safety fix: Drop procedures before used
mysql-test/t/group_by.test:
  Added test that was lost during earlier merge
mysql-test/t/information_schema.test:
  Safety fix: Drop procedures before used
mysys/hash.c:
  Updated comment
sql/field.cc:
  false -> FALSE
sql/ha_ndbcluster.cc:
  Fix some style issues
  - No () around argument to 'case'
  - Space before ( in switch and if
  - Removed 'goto'
  - Added {}
  - Added () to make expressions easier to read
  - my_snprintf -> strmov
sql/handler.cc:
  if( -> if (
sql/item.cc:
  Indentation changes
sql/item.h:
  false -> FALSE
sql/item_cmpfunc.cc:
  Ensure that Item_func_case() check for stack overrun properly
sql/item_cmpfunc.h:
  Ensure that Item_func_case() check for stack overrun properly
sql/item_func.cc:
  Indentation fixes
  Fixed wrong goto label
sql/mysqld.cc:
  Remove test for opt_disable_networking as this flag can never be set here
sql/opt_range.cc:
  Simplify code
sql/sql_class.h:
  Move define out from middle of class definition
sql/sql_parse.cc:
  Remove extra empty lines
sql/sql_select.cc:
  use real_item() instead of (Item_ref*) item
  Modifed function comment to be align with others
  Simple optimization
sql/sql_union.cc:
  Portability fix:
  Don't use 'bool_variable|=...'
sql/sql_view.cc:
  Move List_iterator_fast out from loops (rewind is faster than creating a new itearator)
strings/ctype-utf8.c:
  if( -> if (
strings/ctype.c:
  Remove disabled code
strings/decimal.c:
  Indentation fixes
strings/xml.c:
  Indentation fixes

sql/sql_class.h

@@ -653,6 +653,14 @@ typedef struct system_status_var
 void free_tmp_table(THD *thd, TABLE *entry);
 
 
+/* The following macro is to make init of Query_arena simpler */
+#ifndef DBUG_OFF
+#define INIT_ARENA_DBUG_INFO is_backup_arena= 0
+#else 
+#define INIT_ARENA_DBUG_INFO  
+#endif
+
+
 class Query_arena
 {
 public:
@@ -664,9 +672,6 @@ public:
   MEM_ROOT *mem_root;                   // Pointer to current memroot
 #ifndef DBUG_OFF
   bool is_backup_arena; /* True if this arena is used for backup. */
-#define INIT_ARENA_DBUG_INFO is_backup_arena= 0
-#else 
-#define INIT_ARENA_DBUG_INFO  
 #endif
   enum enum_state
   {
@@ -691,7 +696,6 @@ public:
   */
   Query_arena() { INIT_ARENA_DBUG_INFO; }
 
-#undef INIT_ARENA_DBUG_INFO
   virtual Type type() const;
   virtual ~Query_arena() {};