[PATCH] docs: Update filenames in keep_data_small.txt

[Kang-Che Sung]

(Because I didn't see this one applied on the git master when
Denys Vlasenko's mail said it has been applied, so pardon me to propose
this patch again.)

The filenames in docs/keep_data_small.txt are a little bit outdated.
It's better to change it to the current name.

decompress_unzip.c -> decompress_gunzip.c
(since commit 774bce8e8ba1e424c953e8f13aee8f0778c8a911)
libbb/messages.c -> libbb/ptr_to_globals.c
(since commit 574f2f43948bb21d6e4187936ba5a5afccba25f6)

Signed-off-by: Kang-Che Sung <explorer09 at gmail.com>
---
 docs/keep_data_small.txt | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/docs/keep_data_small.txt b/docs/keep_data_small.txt
index 3ced1a6..218d4f2 100644
--- a/docs/keep_data_small.txt
+++ b/docs/keep_data_small.txt
@@ -59,7 +59,7 @@ wait
  Example 1

 One example how to reduce global data usage is in
-archival/libarchive/decompress_unzip.c:
+archival/libarchive/decompress_gunzip.c:

 /* This is somewhat complex-looking arrangement, but it allows
  * to place decompressor state either in bss or in
@@ -87,7 +87,7 @@ take a look at archival/gzip.c. Here all global data
is replaced by
 single global pointer (ptr_to_globals) to allocated storage.

 In order to not duplicate ptr_to_globals in every applet, you can
-reuse single common one. It is defined in libbb/messages.c
+reuse single common one. It is defined in libbb/ptr_to_globals.c
 as struct globals *const ptr_to_globals, but the struct globals is
 NOT defined in libbb.h. You first define your own struct:

--
2.9.0