Applied innodb-5.0-ss1230 snapshot

Fixes:
- Bug #25596: 


innobase/dict/dict0dict.c:
  Applied innodb-5.0-ss1230 snapshot.
  
  r1230
  
  branches/5.0: ib_isspace(c): Check for c being the null character.
  (Bug #25596)
sql/ha_innodb.h:
  Applied innodb-5.0-ss1230
  
  Trivial indent SPACES -> TAB change.

innobase/dict/dict0dict.c

@@ -28,7 +28,7 @@ Created 1/8/1996 Heikki Tuuri
 #include "rem0cmp.h"
 
 /* Implement isspace() in a locale-independent way. (Bug #24299) */
-#define ib_isspace(c) strchr(" \v\f\t\r\n", c)
+#define ib_isspace(c) ((char) (c) && strchr(" \v\f\t\r\n", c))
 
 dict_sys_t*	dict_sys	= NULL;	/* the dictionary system */