Remove useless definition of NULL in mbfl_string.h

If NULL is not defined by the platform, mbfl_defs.h already defines it.

diff --git a/ext/mbstring/libmbfl/mbfl/mbfl_string.h b/ext/mbstring/libmbfl/mbfl/mbfl_string.h
index d96a77cca7bfedd8ef43cf50e8fda88f2dbf24df..cdf43758bbbddde26d1319d2affa3f2fb74a6454 100644 (file)
--- a/ext/mbstring/libmbfl/mbfl/mbfl_string.h
+++ b/ext/mbstring/libmbfl/mbfl/mbfl_string.h
@@ -49,8 +49,4 @@ MBFLAPI extern void mbfl_string_init(mbfl_string *string);
 MBFLAPI extern void mbfl_string_init_set(mbfl_string *string, const mbfl_encoding *encoding);
 MBFLAPI extern void mbfl_string_clear(mbfl_string *string);
 
-#ifndef NULL
-#define NULL 0
-#endif
-
 #endif /* MBFL_STRING_H */