[U-Boot] [PATCH V2 4/6] lib: zlib: remove the limitation for cannot using 0 as start

[Lei Wen]

We often need the requirement that compressing those memory range start
from 0, but the default deflate code in zlib prevent us to do this.
Considering the special case of uboot, that it could access all memory
range, it is reasonable to be able to also take the address space from 0
into compression.

Signed-off-by: Lei Wen <leiwen at marvell.com>
---
Changelog:
No change

 lib/zlib/deflate.c |    4 +---
 1 files changed, 1 insertions(+), 3 deletions(-)

diff --git a/lib/zlib/deflate.c b/lib/zlib/deflate.c
index 5c4022f..9a20b70 100644
--- a/lib/zlib/deflate.c
+++ b/lib/zlib/deflate.c
@@ -592,9 +592,7 @@ int ZEXPORT deflate (strm, flush)
     }
     s = strm->state;
 
-    if (strm->next_out == Z_NULL ||
-        (strm->next_in == Z_NULL && strm->avail_in != 0) ||
-        (s->status == FINISH_STATE && flush != Z_FINISH)) {
+    if (s->status == FINISH_STATE && flush != Z_FINISH) {
         ERR_RETURN(strm, Z_STREAM_ERROR);
     }
     if (strm->avail_out == 0) ERR_RETURN(strm, Z_BUF_ERROR);
-- 
1.7.5.4