Configure: provide inflate() when building zlib on win32.

It is now needed for gunzip filter.

auto/lib/zlib/makefile.bcc

diff --git a/auto/lib/zlib/makefile.bcc b/auto/lib/zlib/makefile.bcc
index 56f8356..97a30ea 100644
--- a/auto/lib/zlib/makefile.bcc
+++ b/auto/lib/zlib/makefile.bcc
@@ -8,8 +8,10 @@
 zlib.lib:
 	cd $(ZLIB)
 
-	bcc32 -c $(CFLAGS) adler32.c crc32.c deflate.c trees.c zutil.c \
-		compress.c
+	bcc32 -c $(CFLAGS) adler32.c crc32.c deflate.c \
+		trees.c zutil.c compress.c \
+		inflate.c inffast.c inftrees.c
 
 	tlib zlib.lib +adler32.obj +crc32.obj +deflate.obj \
-		+trees.obj +zutil.obj +compress.obj
+		+trees.obj +zutil.obj +compress.obj \
+		+inflate.obj +inffast.obj +inftrees.obj

auto/lib/zlib/makefile.msvc

diff --git a/auto/lib/zlib/makefile.msvc b/auto/lib/zlib/makefile.msvc
index 2c7c1ae..6fbd691 100644
--- a/auto/lib/zlib/makefile.msvc
+++ b/auto/lib/zlib/makefile.msvc
@@ -8,7 +8,10 @@
 zlib.lib:
 	cd $(ZLIB)
 
-	cl -c $(CFLAGS) adler32.c crc32.c deflate.c trees.c zutil.c compress.c
+	cl -c $(CFLAGS) adler32.c crc32.c deflate.c \
+		trees.c zutil.c compress.c \
+		inflate.c inffast.c inftrees.c
 
 	link -lib -out:zlib.lib adler32.obj crc32.obj deflate.obj \
-		trees.obj zutil.obj compress.obj
+		trees.obj zutil.obj compress.obj \
+		inflate.obj inffast.obj inftrees.obj

auto/lib/zlib/makefile.owc

diff --git a/auto/lib/zlib/makefile.owc b/auto/lib/zlib/makefile.owc
index f75e66d..9e123be 100644
--- a/auto/lib/zlib/makefile.owc
+++ b/auto/lib/zlib/makefile.owc
@@ -9,6 +9,6 @@
 	cd $(ZLIB)
 
 	wcl386 -c $(CFLAGS) adler32.c crc32.c deflate.c trees.c zutil.c &
-		compress.c
+		compress.c inflate.c inffast.c inftrees.c
 	wlib -n zlib.lib adler32.obj crc32.obj deflate.obj trees.obj &
-		zutil.obj compress.obj
+		zutil.obj compress.obj inflate.obj inffast.obj inftrees.obj