Merge vestigial vsnprintf determination from zutil.h to gzguts.h.

This also moves some of the same from zconf.h to gzguts.h. A new
function, gzflags(), was created to pass the compilation flags
related to vsnprintf usage back to zlibCompileFlags() in zutil.c.
In the process, various compiler configuration files were updated
to include gzflags(), as well as the new gzgetc_() function added
when the gzgetc() macro was introduced in a previous patch.

2 files changed, 8 insertions, 2 deletions

diff --git a/contrib/vstudio/vc10/zlibvc.def b/contrib/vstudio/vc10/zlibvc.def
index ad8b4af..0d6dc38 100644
--- a/contrib/vstudio/vc10/zlibvc.def
+++ b/contrib/vstudio/vc10/zlibvc.def
@@ -33,7 +33,6 @@ EXPORTS
         zlibVersion                              @27

         gzprintf                                 @28

         gzputc                                   @29

-        gzgetc                                   @30

         gzseek                                   @31

         gzrewind                                 @32

         gztell                                   @33

@@ -129,3 +128,7 @@ EXPORTS
         inflatePrime                            @158

         inflateReset2                           @159

         inflateUndermine                        @160

+
+; zlib1 v1.2.6 added:
+        gzgetc_                                 @30
+        gzflags                                 @162
diff --git a/contrib/vstudio/vc9/zlibvc.def b/contrib/vstudio/vc9/zlibvc.def
index ad8b4af..0d6dc38 100644
--- a/contrib/vstudio/vc9/zlibvc.def
+++ b/contrib/vstudio/vc9/zlibvc.def
@@ -33,7 +33,6 @@ EXPORTS
         zlibVersion                              @27

         gzprintf                                 @28

         gzputc                                   @29

-        gzgetc                                   @30

         gzseek                                   @31

         gzrewind                                 @32

         gztell                                   @33

@@ -129,3 +128,7 @@ EXPORTS
         inflatePrime                            @158

         inflateReset2                           @159

         inflateUndermine                        @160

+
+; zlib1 v1.2.6 added:
+        gzgetc_                                 @30
+        gzflags                                 @162